Whether you were at the game or following from elsewhere, we want to know what you learned.
What did you make of West Ham's display?
Come back on Monday for a selection of your replies
Burton made one change from their 2-2 draw at Port Vale as the look to shock West Ham.
Jack Armer replaces Alex Hartridge in defence with 12-goal top-scorer Jake Beesley leading the line.
Burton XI: Collins, Godwin-Malife, Armer, Vancooten, Revan, Lofthouse, Evans, McKiernan, Shade, Beesley, Krubally
Subs: Dudek, Chauke, Sibbick, Tavares, Moon, Sraha, Larsson, Adom, Cannon
Defender Konstantinos Mavropanos is the only man to keep his place following Tuesday's draw with Manchester United as Nuno Espirito Santo makes 10 changes for West Ham.
Winger Keiber Lamadrid makes his debut after joining on loan from Deportivo La Guaira in Venezuela in January.
Mohamadou Kante and Adama Traore make their full debuts for the Hammers.
West Ham XI: Areola, Mavropanos, Mayers, Kilman, Walker-Peters, Magassa, Kante, Lamadrid, Scarles, Traore, Wilson
Subs: Herrick, Disasi, Summerville, Taty, Diouf, Wan-Bissaka, Potts, Orford, Ajala
There are seven ties in the FA Cup fourth round on Saturday, and BBC Sport will bring you every moment.
Burton v West Ham (12:15) - BBC Radio 5 Live & BBC Radio Derby
Burnley v Mansfield - BBC Radio Lancashire & BBC Radio Nottingham
Man City v Salford - BBC Radio 5 Sports Extra 3 & BBC Radio Manchester
Norwich v West Brom - BBC Radio Norfolk & BBC Radio WM
Port Vale P-P Bristol City
Southampton v Leicester- BBC Radio Solent & BBC Radio Leicester
Aston Villa v Newcastle (17:45) - BBC iPlayer, BBC Radio 5 Sports Extra (with second half on BBC Radio 5 Live), BBC Radio WM & BBC Radio Newcastle
Liverpool v Brighton (20:00) - BBC Radio 5 Live, BBC Radio Merseyside & BBC Radio Sussex
Kick-offs 15:00 GMT unless stated
Follow all of the action and reaction here
You can also listen to today's 5 Live commentaries on most smart speakers. Just say "ask BBC Sounds to play Burton v West Ham" of "ask BBC Sounds to play Liverpool v Brighton", for instance.
Find out more about how to listen to football on BBC Sounds
How to follow the FA Cup fourth round on the BBC
Image source, Getty ImagesRecently, Liverpool and the Netherlands captain Virgil van Dijk said former players-turned-pundits have a responsibility when discussing the performances of the current generation of footballers.
He believes they can stray into "clickbait" and have a possible impact on players' mental health.
On Thursday's episode of the More than the Score podcast, former Scotland international Pat Nevin and chief sports editor for Dutch newspaper De Telegraaf Marcel van der Kraan join John Bennett to discuss and analyse the modern world of punditry and the impact it can have on players and managers alike.
"As a player you do tend to take it to heart, especially when it feels a little personal," said Nevin.
"Generally, it isn't personal and the pundit is just having their opinion and we all kind of know where the lines are. But, the lines have been jumped over more often in recent years and I think Van Dijk is right about that.
"Because of the clickbait, it is so much easier to get more likes, views and work if you're a little bit more extreme. Ex-players aren't stupid and they know that. If you are too sensible and sit on the fence you won't get the big gigs.
"You have a dichotomy. Most ex-players would like to be balanced but they know if they are too balanced and sensible they won't be there next week.
"My criticism would always be constructive criticism which is explained. One-dimensional labeling of players should never happen. Sometimes if a big name says something enough it becomes accepted wisdom."
Van der Kraan added: "There are two different kinds of pundits; those who need to be on every week and those who are genuinely focused on what is right and what players should do.
"For Van Dijk, after so many years enough is enough.
"It all started after he came into the Netherlands team and became a big player at Liverpool. The first ex-player to really criticise him was Marco van Basten, saying he was not a leader. Van Dijk was biting his lip after every match because it became a bit of a stigma.
"Eventually it filtered to England and every time he had a bad game it became an open nerve."
Listen to the full episode on BBC Sounds
Flora Snelson
BBC Sport journalist
West Ham boss Nuno Espirito Santo has been speaking to the media before Saturday's FA Cup game against Burton Albion at the Pirelli Stadium (kick-off 12:15 GMT).
Here are the key lines from his news conference:
Pablo is injured and "he'll be out for a while, we don't know exactly how long".
With the exceptions of Pablo and Jean-Clair Todibo - who is suspended - all players are available for the cup tie.
On the impact of their improved performances: "What happened ignited the atmosphere at the London Stadium, our home, we can feel it. The place gives and the fans give back in a huge way for us."
On the sackings of Thomas Frank and Sean Dyche: "This is what the industry is all about, unfortunately for my fellow colleagues. They will get back in the game soon."
On giving up a lead against Man Utd: "It was a tough one to take. But we performed really well against a very good team."
On their FA Cup hopes: "It's a beautiful competition. We're going to compete, we're going to try and go through."
On team selection for Burton: "The cup is always a good chance to give minutes to players who don't get many, for them to improve - we will need them further ahead."
Nuno confirmed that Alphonse Areola will play against Burton.
On Adama Traore: "He has a lot of things to improve, having been out of competition for a while, but he's putting all that he can into training sessions. We need him to get back to his best."
You can listen to full commentary of Burton v West Ham on BBC Radio Five Live on Saturday
Image source, Getty ImagesThe 40-point mark - or thereabouts - could be needed once again to guarantee Premier League survival this term, with an in-form West Ham United attempting to chase down the sides above them.
That mythical number has often been cited as the threshold at which managers, players and fans can relax - but the total has not actually been needed to stay up since 2010-11.
Prior to that the only other occasions clubs were demoted with 40 points or more were 1996-97, 1997-98 and 2002-03.
But could that be about to change?
West Ham, who are 18th in the top flight, are only three points behind 17th-placed Nottingham Forest, who sacked manager Sean Dyche after Wednesday's goalless draw with Wolves.
While Tottenham - who sacked boss Thomas Frank on Wednesday - are 16th, another two points ahead of Forest.
West Ham's current points tally (24) is the most by any side in 18th at this stage of a campaign since 2019-20, when the Hammers recovered to stay up with 39 points.
Leeds also look to have found some momentum with recent wins over Fulham and Forest as well as draws at Everton and Chelsea.
In contrast, Spurs have managed a meagre four points from the previous 27 available to them.
Meanwhile, now managerless Forest have won just two of their past 10 games and fans of Brighton and Crystal Palace may also be looking over their shoulders.
The 14th-placed Seagulls (31 points) are on a dismal run having won just one top-flight game since 30 November.
Palace - who are a place and a point above Brighton - have only tasted victory once since 7 December and most recently let a two-goal lead slip as they lost to struggling Burnley.
That magic 40-point mark could well be needed once more to avoid dropping into the Championship.
Pundits Alan Shearer and Danny Murphy join host Kelly Somers to bring you the action and talking points from Tuesday's and Wednesday's Premier League fixtures.
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We asked for your thoughts after Tuesday's Premier League game between West Ham and Man Utd.
Here are some of your comments:
West Han fans
Manni: It's the first time in a long time that an atmosphere like that has been around the London Stadium! The energy was great and finally a feeling of togetherness! Keep that effort and we might be OK.
Joe: Would have took a point before a kick of the ball but I'm still gutted for the boys. Played really well and was undone by a wonder goal. If we keeping playing like this, we will have teams looking over their shoulder.
John: I was there last night. I'm sorry but despite the support and the energy we can't win important games. We will keep fighting and I would expect nothing less after the last two seasons but we will get relegated. We need too much from the teams above us. I can't see Spurs and or Forest continuing their bad form.
Harry: This result hurt. We were perfect for 95 minutes. Baffled at where they got seven minutes extra time from. The VAR check was quick, no injuries and not all subs were used. To say Man Utd deserve a point just because they attacked hard undermines the brilliant performance from our defenders who kept them out. With all that attack they could only register nine shots with three of those shots being on target. Although it hurts, the belief is back thanks to Nuno. West Ham won't get relegated if we can keep performing like that.
Adrian: We let them come on to us too much in the second quarter and were lucky not to concede. But this West Ham team is a level above the team that Nuno took over. It's really exciting to see them pulling together and the 12th man - us, the fans - is responding at last.
Man Utd fans
Nick: The first half was full of fear - we played at a walking pace. The second half only turned into a match once West Ham scored, and I don't understand why we didn't go after them from minute one.
Bernard: Clearly massive improvement on Amorim but we need to start coming out of defence with more energy and positivity. Martinez has shown in previous years that he can do this but this season has taken to walking out with the ball. And Luke Shaw has become entirely predictable in receiving the ball and just passing backwards. We are providing the opposition too much time to pack their defence and mark our players.
Bob: Looked like some of the players thought they only had to turn up to win and they forgot West Ham are fighting for survival.
Siggi: They were lethargic and at times not very interested. A pity as although West Ham are playing a little better while fighting for survival, they are only a mediocre team. We beat four stronger opponents on the trot recently. United will beat Everton when they next play.
John: West Ham executed their game plan excellently. All credit to them, but a brilliant point for us and loving the desire to fight until the end. Carrick is still unbeaten at United which is quite remarkable.
Image source, Getty Images"West Ham look transformed at the moment," according to ex-Hammers winger Matt Jarvis.
The 39-year-old was speaking to BBC Radio 5 Live Breakfast following West Ham's 1-1 home draw with Manchester United.
West Ham have picked up 10 points in their last five games, after 14 points in their opening 21 games.
"They look an attacking threat and solid at the back. It's been a good period of time for West Ham," said Jarvis.
"It [the belief] wasn't [there a few weeks]. It's there now. You look at the performances and atmosphere. A really great response."
Speaking about forward Crysencio Summerville, Jarvis said: "He's been outstanding. He was out for a long time with injuries and now he's in such good form. He's electric when he gets the ball. He's working back like everyone else.
"Taty [Castellanos] up front is running all day long. He's making sure the opposition defence don't have enough time on the ball to do what they want.
"Now they're a squad who are together. The crowd, the atmosphere last night was a massive difference to what it has been."
Image source, Getty ImagesLionesses legend - and West Ham fan - Ellen White fears Manchester United's late equaliser could give the Hammers a mountain to climb.
Tomas Soucek looked set to have given West Ham three points before Benjamin Sesko struck in injury time to make it 1-1.
"It's two points dropped for West Ham," said White on BBC Radio 5 Live's Football Daily.
"To have 26 points would have have put them in an amazing position. If Nottingham Forest beat Wolves on Wednesday it's a five-point gap. That's a huge mountain to climb again. This will be a huge devastating result for them. I'm not sure whether one point is enough."
Ex-Premier League midfielder Michael Brown agreed "it's a big blow" but still "a huge point" and praised the work they did in the January window.
"I feared for West Ham. I didn't think they had a chance unless they were creative at the end of the window. They did a little bit, not as much as we thought. The training ground will be a good place."
He added: "Bournemouth is the must-win game to try to close the gap. West Ham are coming back and showing great signs."
Phil McNulty
Chief football writer
Image source, Getty ImagesWest Ham United's players and fans were plunged into despair when the joy of a crucial victory was snatched away in the dying seconds against Manchester United.
Tomas Soucek's goal looked to have put them level on points with Nottingham Forest, increasing the pressure on Sean Dyche's side before their vital meeting with fellow strugglers Wolverhampton Wanderers on Wednesday.
Instead, after a display that carried all the hallmarks of their recent improvement, they had to settle for a point that will feel like a bitter disappointment.
So much of West Ham's performance will have delighted Nuno Espirito Santo, with the evidence here suggesting that if this standard is maintained, they can reel in those ahead of them in the fight to avoid the drop.
Crysencio Summerville was once again a real threat, while Soucek's goal was his trademark, stealing into the area to apply a subtle finish to Jarrod Bowen's cross.
After that, West Ham were organised and resilient while continuing to pose a threat on the break, even though Manchester United threatened.
There was much to admire - but there is no escaping the fact that allowing two points to slip through their fingers so late on will be a real source of regret.
West Ham boss Nuno Espirito Santo, speaking to BBC Match of the Day: "Disappointed, all of us are to get this in the end. We had a good game, the boys worked hard but today it was not to be.
"It is a draw that gives us sadness but the way we competed today was really good.
"It is a mix of everything - the need that we have and the work from the boys today deserved so much more.
"We should be proud and this is the way, we must compete in every game like this.
"We should keep the standards, I said that to the boys and their faces are of a job well done. They hurt and it is painful.
"You look back to the game and it is always the final moments that you think you almost got across the line but then get a big punch in the stomach. It is painful."
Did you know?
At 95:11, Benjamin Sesko's equaliser for Manchester United was the latest result altering goal West Ham have conceded at home on record in the Premier League (since 2006-07).
The Hammers have dropped more points from winning positions than any other side in the Premier League this season (20).
Tomas Soucek's opener for West Ham was his 39th Premier League goal, the outright most of any Czech player in the competition's history (one more than Patrik Berger).
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Whether you were at the game or following from elsewhere, we want to know what you learned.
Have your say on West Ham's performance
What did you make of Manchester United's display?
Come back on Wednesday for a selection of your replies
Nuno Espirito Santo makes one change to the West Ham side that won at Burnley on Saturday, with midfielder Freddie Potts coming in for striker Callum Wilson, who drops to the bench.
West Ham are looking for a fourth win in five games, which would move them level on points with fourth-bottom Nottingham Forest, who entertain bottom side Wolves tomorrow. It would take a four-goal triumph for West Ham to move out of the bottom three tonight.
West Ham XI: Hermansen, Wan-Bissaka, Mavropanos, Disasi, Diouf, Bowen, Potts, Soucek, Mateus Fernandes, Summerville, Castellanos.
Substitutes: Areola, Walker-Peters, Kilman, Wilson, Traore, Magassa, Scarles, Kante, Mayers.
Image source, Premier LeagueManchester United head coach Michael Carrick names the same starting line-up for the third game running.
With Mason Mount and Matthijs de Ligt still sidelined, there are no changes to the United bench either, with Tyler Fletcher named again after making his senior debut against Tottenham at the weekend.
Manchester United XI: Lammens, Dalot, Maguire, Martinez, Shaw, Casemiro, Mainoo, Amad, Bruno Fernandes, Cunha, Mbeumo.
Substitutes: Bayindir, Mazraoui, Zirkzee, Malacia, Yoro, Ugarte, Heaven, Sesko, T Fletcher.
There are four games in the Premier League on Tuesday and BBC Sport will bring you every moment.
Chelsea v Leeds
Everton v Bournemouth
Tottenham v Newcastle
West Ham v Manchester United (20:15)
Kick-off times 19:30 GMT unless stated
Follow all of the action and reaction here
And listen to Around The Grounds on BBC Radio 5 Live and BBC Sounds from 19:00
Find out more about how to listen to Premier League football on BBC Sounds
James Jones
Fan writer
Image source, Getty ImagesA little over a month ago, after the 2-1 home defeat to Nottingham Forest, West Ham were seven points from safety and staring a return to the Championship square in the face.
That night felt like the final nail, especially considering the manner of the defeat, where VAR disallowed a first-half goal from Crysencio Summerville that would've seen us go 2-0 up and then awarded a controversial 89th-minute penalty for Forest to snatch all three points.
But since then, West Ham have shown signs of life and fight with three wins from our last four Premier League outings, including a late win at Tottenham and a convincing home victory over Sunderland. The one defeat, against Chelsea, saw us leading 2-0 at half-time. The performances and the form have improved to the point where it would be dangerous to write us off just yet, given there's now just a three-point gap between us and 17th-placed Forest.
There are similarities to the 2006-2007 season. West Ham were 10 points from safety heading into a home game against Tottenham. Having lead 2-0 at half-time and then 3-2 with five minutes to go, Spurs scored two late goals to win 4-3. Fans were crying in the stands. Mark Noble was crying on the pitch. It felt over then.
But that defeat sparked a run of seven wins in our final nine league games, securing Premier League safety and a 15th-place finish. One of the two defeats in that run came against Chelsea, too.
There's more football to be played now compared to then, but there is real optimism that West Ham could pull off yet another great escape.
With Summerville's goal scoring form, Bowen's importance and Mateus Fernandes' midfield dynamism, anything is possible right now.
We go again tomorrow against Manchester United...
Find more from James Jones at We Are West Ham, external
Chris Adams
BBC Sport journalist
West Ham United have proven to be something of a bogey team for Manchester United in recent years and will be hoping to continue their good form when the two sides meet at London Stadium on Tuesday evening.
The Hammers have won four of their last six Premier League games against the Red Devils, including both meetings last season - more than they had in their previous 28 meetings.
Nuno Espirito Santo's side find themselves in 18th position, largely because of some dreadful home form that has earned them just 10 points from a possible 36, but they have beaten Manchester United in their last three encounters in east London.
Hammers shed unwanted record
Saturday's 2-0 win over fellow strugglers Burnley was West Ham's third win in four after 10 games without a victory.
It saw the Irons end a dire run of 21 league games without a clean sheet – their first under Nuno – a welcome shutout that coincided with a debut for on-loan Chelsea defender Axel Disasi and a recall for goalkeeper Mads Hermansen.
In attack, the Hammers are notably more dangerous since January arrivals Valentin Castellano and Pablo entered the fray, having scored at least twice in four consecutive top-flight games for the first time since a run of five in December 2021-January 2022. But one of the main reasons they've won three of their last four league games is Crysencio Summerville.
The rejuvenated Dutch winger is one of the league's in-form players, with a fine display in the FA Cup third-round win over Queens Park Rangers triggering a run of five goals in five consecutive games in all competitions - the first West Ham player to achieve that feat since Jesse Lingard in March/April 2021.
High five for Carrick?
Four wins on the spin for Manchester United under Michael Carrick has the Old Trafford faithful dreaming of Champions League football again with the Red Devils sitting fourth, unbeaten in eight, just three points behind Aston Villa.
A 2-0 victory over Tottenham Hotspur on Saturday marked the first time United have won four league games on the trot since February 2024 under Erik ten Hag; it was during the Dutchman's reign they last won five-in-a-row in a single league season, in November 2022-January 2023.
The sparkling form of Bruno Fernandes, Bryan Mbeumo and Matheus Cunha has helped the Reds rattle home 10 goals in Carrick's four games in charge, but equally as pleasing for the new head coach will be the two clean sheets in that time – as many as United had recorded in the 23 games this season prior to his appointment.
Carrick's return to the dugout against Manchester City marked the first time Harry Maguire and Lisandro Martinez had started a league game together since February 2025 and their experience in place of Leny Yoro and Ayden Heaven has resulted in form befitting of a team targeting a top-four finish. Nobody in the competition has won a higher percentage of duels than Maguire (81.5%) since his return from injury.
The expectation will be on Carrick to record a fifth successive win but he will be wary of the club's poor recent record in midweek away games; United have won just one of their last nine such games on the road, losing five.
Both of these teams have found a bit of form, and West Ham's victory over Burnley was huge for them in their fight against the drop.
It seems Manchester United can do no wrong under Michael Carrick, who has often been linked with the West Ham job down the years but goes back to his old club looking for a fifth straight win.
I think he will get it, too. We had some callers into 606 thinking United would be Arsenal's biggest challengers from now on, which seems a stretch, but there is no doubt they are on a bit of a high.
This is the sort of game where idiots like me can get sucked in and get on the Carrick bandwagon... I am wary, but I am still going to be positive and jump on board too.
Sutton's prediction: 1-2
Steven Wyeth
Final Score reporter
Image source, Getty ImagesPraise for a manager whose team remain in peril is potentially premature, but Nuno Espirito Santo deserves some for giving West Ham belief.
For those of us who stalk Premier League tunnels, microphone in hand, Nuno is a challenging interviewee. Soften spoken and succinct, getting an expansive answer to even a carefully phrased question is rare.
However, whatever he's said to his players in recent weeks has been impactful.
Nine points from a possible 12 is as good as the Hammers have had in the Premier League since December 2023, when David Moyes delivered three successive wins and West Ham sat sixth in the table.
The cautious, stoic demeanour remained in place at full-time at Turf Moor but Nuno has his team playing with conviction, and back in contention to reel in those sides just above the relegation line.
