Arthur Masuaku does well to escape several challenges on the left touchline before playing a nice, weighted pass towards Marko Arnautovic.

The West Ham striker nudges it past Gary Cahill and runs around him the other way before he's tackled by N'Golo Kante.

There's a strong shout for a penalty but the replay shows Kante may have just got a crucial touch on the ball.

Either way, it's not given and Eden Hazard goes straight up the other end and has a shot saved by Joe Hart.

Image source, Reuters

Josh Cullen is given a chance to show his worth. He replaces Joao Mario for his ninth senior appearance.

Another substitution hero?

Danny Mills
Former England defender on BBC Radio 5 live

You feel that someone's going to get one big chance in the next 10 minutes - but will they have the composure to tuck it away? The game has opened up incredibly since Javier Hernandez's goal.

West Ham are mounting the pressure on now and the game has opened up. Chelsea clear a number of crosses into the box but can't get away on the counter-attack.

Cesar Azpilicueta catches Javier Hernandez on his ankle and the West Ham striker twists dramatically in the air with a squeal and goes to the ground.

He could be a gymnast with those moves. It's a free-kick though, much to the frustrations of Azpilicueta.

Harish Lakka: I don't get why people are premature to jump to conclusions and make statements. Yesterday it was about Mourinho, and today it is about Moyes. A game lasts 90 mins, and a season 38 games. There is a season every year. Enjoy the game folks.

Johnny Magrinho: And people were saying earlier Chelsea can catch Liverpool? Really? I can’t see anything other than a comprehensive victory for Liverpool at Stamford Bridge when we meet later in the season, unless by that time we don’t need to win and simply let Chelsea get a point.

Cesc Fabregas plays a lovely weighted pass into Eden Hazard but his first-time shot is blocked.

He regains possession from the rebound and flicks it into Olivier Giroud but it's once again cut out.

Andrew Walker: Yes this is a Moyes tactical masterclass.

Image source, AFP

Danny Mills
Former England defender on BBC Radio 5 live

Unbelievable save from Joe Hart from a fantastic shot from Marcos Alonso. Alonso spins on it and unleashes a drive, but Hart is equal to it to tip it over the bar.

What a strike! Olivier Giroud lets it run to Marcos Alonso on the edge of the box and the Chelsea man unleashes a ferocious strike which is heading into the top of the net.

Joe Hart does brilliantly to get his fingertips on it and tip it over the bar.

Jay: Typical recent Blues - boss the match, fail to build lead and then a defensive blunder hand the opponents a goal.

Femi: Cahill remains his calamitous self.

Olivier Giroud is on for Alvaro Morata and Pedro comes on Victor Moses. Chelsea are going for it.

The corner kick isn't a good one and Cesc Fabregas does well to defend it - backheeling it to Marcos Alonso who is able to bring it out and win a throw-in.

That goal has breathed new life into West Ham. Marko Arnautovic wins a corner.

James Pye: Chicharito always scores against Chelsea.

Josh: Water is wet. The sky is blue. And Chicharito always scores against Chelseaa... Oh, and we can never kill a game off.

Danny Mills
Former England defender on BBC Radio 5 live

West Ham's performance today does not deserve a point or more, they've been lackadasical - but that's football. Chelsea should have put this game to bed long ago.

That's the ninth goal Javier Hernandez has scored against Chelsea in his career.

Something tells me he enjoys playing against them...

Image source, Getty Images

Danny Mills
Former England defender on BBC Radio 5 live

It's a fabulous finish from Javier Hernandez, he gets his head over the ball and fires it into the corner. But that is shocking defending from Chelsea, I don't even know where Gary Cahill was trying to head that ball, and Hernandez is totally unmarked. They've scored with their second shot on goal.

LK: Is this a Moyes tactical masterclass or does he want to continue rebuilding his managerial career in the championship? Do West Ham want to go down?