The Hammers are still in control.

Andriy Yarmolenko tries a backheel to keep the ball in play on the baseline but it's cut out.

Anthony Martial tries to counter but Mark Noble is back to defend and West Ham can build another attack.

Image source, Opta

John: Bright start for West Ham. If they keep playing the way they do, I can only see Manchester United dropping points.

Aleksander Pagels: I'm a Man United fan and I find this West Ham side more exciting to watch than my own team. Sad times

Loser92: Manchester United look clueless out there. West Ham could be out of sight by half time.

Jose Mourinho slapped his thighs and turned back to his bench following that miscontrol from Martial.

Paul Pogba then turns around frustratingly to his teammates as he'd closed down in the box. He wanted a shout to say there were two players on him.

Image source, Reuters

Stephen Warnock
Ex-Liverpool defender on BBC Radio 5 live

Marko Arnautovic is having free will to run and United's defence aren't sure whether to press or sit back and contain their formation. West Ham are running at them and they're right to do it. They're doing it really well. Luke Shaw doesn't know how to deal with it and Victor Lindelof is lost completely.

Image source, Reuters

The game has started to settle a little bit now. Manchester United have the ball and are trying to build some momentum.

Anthony Martial and Ashley Young combine down the right but when the return ball comes back to Martial, his touch is too heavy and he nudges it out for a goal kick.

MrBlunt: Here We Go Again #JoseOut

Scott: Enough is enough. Something has to change.

James Ballantyne: Lose today and Mourinho must go. No manager is bigger than the club.

Image source, Getty Images

The ball flies in from the right and Romelu Lukaku and Anthony Martial are waiting in the centre. It comes to Martial but his header is scuffed and bounces miles wide.

Both players were offside anyway though.

Prior to today, West Ham had failed to score in their last three games against Manchester United.

It's already been an improvement.

Lukasz Fabianski has the ball in his hands for the first time. It's a long ball over the top from United and the keeper comfortably picks it up.

He plays a careless ball out wide but West Ham win back possession in midfield. Andriy Yarmolenko tries to beat the offside trap but is unsuccessful.

Ash Williams: United have either not got going or don’t care about Mourinho. Either way West Ham have been terrific in 5 minutes.

Herbert: Shambolic defending once again. Very poor start

West Ham are piling the pressure on. United haven't left their own half yet. It's backs to the wall at the moment.

Marko Arnautovic flicks the ball on and it appears to come off Chris Smalling's arm. The crowd protest for handball but the referee waves play on.

Stephen Warnock
Ex-Liverpool defender on BBC Radio 5 live

All the danger comes from Man United's formation. Pablo Zabaleta makes a lovely run behind Luke Shaw and fizzes a ball across to Felipe Anderson. Great finish. Superbly-worked goal.

Kolo KK: BOOOOM. Great Start from West Ham!

It's West Ham with the early possession. Chris Smalling heads the ball clear but the Hammers have a throw-in on the sidelines.

Stephen Warnock
Ex-Liverpool defender on BBC Radio 5 live

Alexis Sanchez doesn't feature for Manchester United today and Stephen Warnock believes he needs to be given a chance.

"He's been very poor since his move but ultimately you need to get on the pitch and show them what you can do.

"In fairness, sometimes Jose Mourinho doesn't give people much time to prove themselves but he's under pressure and needs players like Sanchez for results.

"As a player you need to have bad games and run through it. We know Alexis Sanchez is a world class player and all he needs is that one moment of magic to put things right and get playing again."

Scott McTominay looks to be playing at centre-half for Manchester United today...

First corner of the game goes to West Ham.

Felipe Anderson to take.

Paul Ince
Former England midfielder on Football Focus

When I saw West Ham's first game against Liverpool they got absolutely roasted and were all over the place. They were unlucky against Arsenal and could have easily won the game. The turning point was getting the 3-1 win at Everton which was a massive result and they applied themselves very well against Chelsea.

They will be looking at today's game and see there's a lot of stuff going on at Old Trafford, they're not playing well, they got knocked out of the cup by Derby and drew against Wolves so they'll see this as a great opportunity to get three points.

"Forever blowing bubbles" rings out in the London Stadium.

It's a beautiful day and the football is up and running.