Final score: Manchester United 2-1 West Ham United
FT: That's it, Manchester United just about cling on by their fingertips for the victory. They were pushed all the way by the Hammers, who will count themselves unfortunate not to have taken anything from the contest. They had it all to do when Wayne Rooney and Robin van Persie put them 2-0 up in the first quarter of the game, but Diafra Sakho's 37th minute header gave them hope. Following Wayne Rooney's red card they spent virtually all the second period in Red Devils territory and thought they had their point when Nolan stabbed home at the death. The hosts were spared by the offside flag and West Ham are left to think what might have been.
90+3: Another few seconds drift by as Tom Thorpe replaces Angel Di Maria..
90+1: In the first of those it's the home side on the attack and Adrian goes into the book for handling outside his area by the by-line as Tomkins headed back to him. A chance for the hosts to kill time.
90: Four minutes of added time for the Hammers to find a leveller.
89: West Ham have the ball in the net but it won't count. They work the overlap perfectly for Jenkinson to fire low across the six-yard box. Nolan is there to tap home, but he is judged to have just strayed beyond the last man and offside is the call.
87: Yet another corner as Jenkinson has the chance to run at Shaw, but the defender does well to stand him up and block the cross. Downing sends the cross over and Tomkins rises beyond the far post, but there's too much pressure on him and the ball slides behind for a corner.
85: Free kick for the Hammers 35 yards out after Valencia is clipped by Di Maria. The Ecuadorian will take himself, but the shot is overhit and De Gea can watch it over his crossbar.
83: Great ball in from Jenkinson after he drives down the right flank, but McNair is there to flick clear from the waiting Sakho.
82: Valencia cuts in from the left flank, beating a coupe of tackles along the way and sending in a shot which deflects wide of the right hand post.
80: No way through for West Ham at the moment as the hosts stand strong at the back. Luke Shaw buys his team a bit of time with a free-kick inside his own box after Carlton Cole jumps into him trying to win a header.
77: West Ham probing as they look to break down the home defence. Cresswell makes a good overlapping run down the left and Downing finds him with his clipped pass, but his attempted cut back is blocked by McNair.
75: Big Sam makes his final substitution of the afternoon, with Kevin Nolan on in place of Diego Poyet.
74: That's the end of Herrera's afternoon, with Antonio Valencia coming on to replace him.
72: Corner for the Hammers as McNair clears on the stretch. Downing's cross is headed behind for another by Fletcher, and the second effort is cleared. Sakho clips Herrera's heels as he tries to instigate a break and he goes into the book. No debate about that one - a clear booking.
70: Manchester United enjoy their first spell of possession for a while, but it ends when Di Maria passes the ball out of play for a goal kick.
66: The Hammers are certainly on the front foot at the moment and Cole does well to turn inside the box. He passes back to Downing, whose cross is knocked clear to Song, and the move ends when the Hammers man's pass is misplaced.
64: West Ham make their second change of the afternoon as Carl Jenkinson replaces Guy Demel at right back. Meanwhile, the hosts bring on Darren Fletcher for Radamel Falcao.
62: West Ham look to make the most of their extra man straight away, and Sakho gets up above Shaw at the far stick to meet Downing's cross, but the angle is against him. The net ripples, but it's only the side-netting and Mn Utd still lead 2-1.
59: Red card. Wayne Rooney is off for the hosts. The home fans don't like it, but he cannot really have any complaints. Downing was looking to break from deep, but Rooney cuts him off with no pretence of trying to win the ball. It's more of a kick than an attempt to trip and Lee Mason has no hesitation in reaching for the red cad. Big Sam reacts immediately by bringing Carlton Cole on for Amalfitano.
58: Corner for Man Utd as Di Maria makes an angled run across to the left channel, but sees his pass deflect behind off the covering Sakho. West Ham see that one out, but van Persie wins a second corner off Cresswell. Di Maria crosses, but Reid heads clear.
55: Close! Song makes a break from midfield and gets the ball to Downing. He in turn feeds Cresswell, whose cross travels all the way to Sakho at the far stick. He catches it well, but the angle is too tight to beat De Gea, who knocks behind for a corner. Downing's delivery is dangerous and leads to a spot of six-yard box pinball, but Herrera eventually concedes another corner, which the home side clear. Still 2-1.
51: Adrian flies to his left to push Falcao's deflected effort behind. The keeper could well have been wrongfooted by the change in direction after the striker's 25-yard effort took a nick off Reid's head, but he shifted his feet and spectacularly pushed it away.
48: Ander Herrera goes into the book for a wild tackle on Downing 40 yards out. Valencia looks like he's lining up a shot, despite the distance to goal, but instead clips into Sakho, who looks to control on his chest. However, the ball runs away from him and the hosts clear.
46: West Ham win the ball back from the off and Downing tries to dig out a cross from the left, but he's under too much pressure and sends the ball beyond the far post as De Gear watches it behind.
4.02pm Manchester United get us back underway for the second period.
HT: The half-time whistle goes and West Ham trail 2-1. They'll be kicking themselves over the goals conceded, in particular the second, when van Persie pounced after Song's pocket was picked in midfield by Herrera. Big Sam's men responded well in the final ten to 15 minutes of the half though and have got themselves back in the contest thanks to Sakho's 37th minute header. We'll be back in 15 minutes for the second half.
45: It's been much better for West Ham since the half hour mark and Poyet's clipped ball over the top gives Sakho a chance against McNari. The defender gets in front of his man, but Sakho's strength earns a corner. Downing swings it over and deep, where Tomkins gets up to try a header back across goal, only for De Gea to claim. Meanwhile, two minutes of added time have been signalled.
43: West Ham win possession again and Song's pass to Amalfitano gives them the chance to break. He knocks a ball into the channel for Valencia to chase and he gets around McNair initially, but touches it just too far and can't get the cross in before the ball travels out for a goal kick.
42: The home side look to have stepped it up again and Falcao does a great job of holding Cresswell off and passing out to Di Maria. His cross is whipped in with great pace, but Adrian is there to punch clear.
40: Man Utd look to come again and a decent spell of possession ends with a pass out to Di Maria. Sakho is across quickly to slide in and tackle at the expense of a corner. Adrian can't get to it, but it goes behind for another one and this time the keeper can punch Di Maria's delivery away.
37: GOAL! Back in it! Demel's cross is blocked behind and Downing's delivery towards the near post area and Amalfitano's header is half blocked by De Gea. It comes across to Valencia, whose header comes back off the bar, but Sakho is waiting to knock the lose ball home with his head. Four in four for the Senegal striker - what a start to his Hammers career!
36: Corner for the Hammers and Downing delivers. Tomkins wins the first header and Amalfitano tries to flick the ball over Blind. It's blocked and West Ham hands go up asking for a penalty, but nothing doing for referee Lee Mason.
35: That's more like it from West Ham. Alex Song takes his time in the home side's half before passing wide to Demel. He crosses first time and it's into a good area, but De Gea is able to rise and claim to avert the danger.
33: Rafael's maurauding runs down the right are proving to be a profitable source of danger for the hosts and he is involved again to pass for Rooney. His cross is blocked, but the home side recycle possession and the ball eventually comes across for Di Maria 15 yards out, but he slices the effort and it goes high and wide.
30: Half-an-hour gone and the Hammers need to respond to the hosts' two-goal blast. If they need any encouragement, they only need to look back to last week, though, when Leicester City fought back from 2-0 and 3-1 down to defeat the Red Devils 5-3.
28: Man Utd come again with Herrera sliding a pass into Rooney's feet down the right. He drills a cross towards the waiting Falcao, but Tomkins is well positioned to head behind for a corner. Di Maria delivers towards the near post but the Hammers hack clear and can look to build again.
25: That was a supreme display of composure in the box from van Persie, who gave Adrian no chance with the finish. West Ham cannot afford to give the attacking talent of the home side that kind of encouragement by losing possession deep inside their own territory.
22: Goal! 2-0 Manchester United and the Hammers will be bitterly disappointed with that one. Adrian's clearance is poor, putting Song under pressure in midfield. He is too ponderous on the ball and his pocket is picked by Herrera, allowing Falcao can feed van Persie in the right channel of the box to finish unerringly into the far bottom corner. That could certainly have been avoided.
21: Rafael gets in down the right and looks to combine with Rooney again - just as he did for the goal. This time the cut back is to the edge of the box and the shot is again first time, but Tomkins gets a head in the way.
19: West Ham look like starting to settle and a free kick 40 yards out allows them to play the ball short and work a crossing opportunity for Demel. His delivery is decent, but Tomkins is under pressure and can't head on target.
17: Di Maria makes a chance fvor himself in the box, collecting Blind's pass and quickly shifting the ball to evade Tomkins' cover. However, his shot is not directed accurately enough and flies over. Still 1-0.
16: A West Ham move down the left breaks down and a couple of quick passes later, the home side have a 3-on-3 break on. Thankfully Falcao's attempted pass to van Persie is overhit and Adrian can come haring out of his goal to clear.
14: Man Utd have been controlling possession for the last couple of minutes, but the Hammers win it back through Cresswell and he looks for Downing down the line but doesn't quite get it right and the hosts can build again from the throw in.
12: Guy Demel makes an important interception to ensure Di Maria can't break away down the left after the home side defend well against a Cresswell free-kick from deep.
10: Di Maria is loking to get involved and he makes an incisive run down the left before passing inside to Falcao. He takes a touch before shooting for goal 25 yards out, but his radar is out on this occasion and the ball slices wide.
9: Play awings to the other end and Rooney sends a curving cross to the far post, but Cresswell does just enough to ensure van Persie cannot reach the ball and the cross swings behind. Goal kick.
8: Space for Stewart Downing to run into in the middle of the park and it looks for a moment that a shot is there to take on, but he tries to turn back inside and is crowded out.
6: An immediate chance for a leveller as all of a sudden Enner Valencia finds himself through on goal, onside from a loose back pass. He lashes at the effort and doesn't keep control of it as it flies over the crossbar. That was a clear opening for the Hammers and he'll be disappointed not to have hit the target.
5: Goal! Manchester United lead and it's a really smart finish from Wayne Rooney. Rafael makes an overlapping run from right back, doubling up on Aaron Cresswell to streak away down the right. He delivers and Rooney meets it first time, cushioning the ball across Adrian and into the far corner. 1-0.
2: Song catches Di Maria again and this time he's in thee book. Not the way the on loan Barcelona man would have wanted to start the game.
1: West Ham have the early possession rom kick-off, but the hosts regain the ball and Song is penalised for a foul after sliding in on Di Maria. Free-kick to the home side midway inside the half. The delivery goes all the way through the Hammers box and Adrian can clear from the goal kick.
3pm Stewart Downing and Diego Poyet get us underway. Come on you Irons!
2.55pm The teams make their way out to the pitch, with the Hammers led by skipper for the day Alex Song. We're in our blue away kit today - it brought us good luck at Crystal Palace so let's hope for a similar result today!
2.50pm Ten minutea away from kick-off now and the 2,500 Hammers fans away to our right are in good voice.
2.15pm So a first Premier League start for Diego Poyet today. Adrian made his top flight bow at Old Trafford last year and now it's the 19-year-old former Charlton man's turn to announce his presence on the grandest of stages. He has already come off the bench once for the Hammers in the league, but steps up now after Mark Noble suffered a calf injury late in the week.
2.10pm Guy Demel has been talking to Premier League Productions pre-match and here's what he had to say.
"It's never easy coming to Old Trafford and we know it's going to be a hard afternoon for us. But we feel we can cause them problems, after the Liverpool game we've grown in confidence.
"They've signed some really good players. For us, as defenders, I think it's going to be hard but it's nice to play against big players and that's why you play in the Barclays Premier League. It won't be easy, but we're going to try to keep a clean sheet and to expose them.
"You can see that the Liverpool game was a key one for us and we want to continue to try to play that brand of football and be successful."
2.05pm: What do you make of our starting XI? Can we repeat last weekend's performance and defeat Manchester United on their own patch for the first time since May 2007? Let us know across our social media platforms using #MNUWHU.
2pm: The team news is in. West Ham make two enforced changes to the side which beat Liverpool 3-1 last weekend. Groin strain victim Cheikhou Kouyate is replaced by goalscorer Morgan Amalfitano, while Diego Poyet makes his full Barclays Premier League debut in place of Mark Noble, who hurt his calf in training on Friday. West Ham will be captained by Alex Song.
Meanwhile, Kevin Nolan returns to the bench after recovering from a fractured shoulder.
For Manchester United, the big question has been 'Who will start at centre-back?' and the answers are Marcos Rojo and Patrick McNair. McNair is a 19-year-old Northern Irishman listed as a midfielder on Manchester United's official website!
Manchester United: De Gea, Rafael, Shaw, McNair, Rojo, Blind, Herrera, Di Maria, Rooney (c), Van Persie, Falcao
Subs: Lindegaard, Thorpe, Fletcher, Pereira, Januzaj, Valencia, Mata
West Ham United: Adrian, Demel, Reid, Tomkins, Cresswell, Poyet, Song (c), Amalfitano, Downing, Sakho, Valencia
Subs: Jaaskelainen, Jenkinson, Collins, Nolan, Zarate, Vaz Te, Cole
1.35pm: The Hammers will be looking to register a first win at Old Trafford for the first time since the final day of the 2006/07 campaign - and who could forget that Great Escape?
Here are some pre-match stats to give us encouragement...
*Man Utd have made their worst-ever start to a Premier League season, with just five points from as many games.
*The Red Devils have tasted defeat in ten of their last 25 home league games - the previous ten defeats came across a period of 148 games.
*Stewart Downing's three assists this season mean he has already overhauled his total from last term.
A very warm welcome to our live coverage from our Barclays Premier League game at Manchester United.
The Hammers are looking to extend their good run of form, having beaten Liverpool 3-1 at the Boleyn Ground last Saturday through goals from Winston Reid, Diafra Sakho and Morgan Amalfitano.
West Ham have made a bright start to the campaign, securing seven points from five games. Yet there is a feeling around the club that the level of performances deserve even more.
Manchester United, however, suffered a humiliating 5-3 loss to Leicester City last Sunday as they collapsed having been 3-1 ahead. The new Red Devils manager, Louis van Gaal, has had a turbulent start to his reign at Old Trafford, taking only five points from as many games.
We'll have all the pre-match build up over the next couple of hours so stay here for the latest from Old Trafford