Hello and welcome to Eurosport's coverage of the early Premier League game between West Ham and Chelsea. I'm Ciaran Baynes and I'll be following the game with you.

What a win for West Ham and it is likely to mean Chelsea will be usurped at the top of the table tonight. Thanks for following the match with us. And decide for yourself, was it a deflection, I still can't tell...

Christensen gets booked for a foul on Antonio as their legs entangle on the left flan.

Coufal is booked for the Hammers as he delays a counter-attack.

Bowen with a chance to seal it but he blazes over the bar.

GOAL FOR WEST HAM! Masuaku has put West Ham in front. Wow. Mendy was anticipating a cross and it seems like the Hammers sub misjudged his cross and it caught the Chelsea keeper out at the near post.

Benrahma comes on for Lanzini.

Loftus-Cheek feeds Hudson-Odoi on the left-hand side of the penalty area but the winger fails to find a team-mate in the box.

Antonio outmuscles Hudson-Odoi then drives a ball across the six-yard box which Bowen stretches ever sinew to reach at the far post but though he makes contact, he cannot drive it at goal.

Alonso comes off for Pulisic, so Chelsea going more attacking too now.

He wanted to carry on but Zouma has now come off for Fornals. You have to think they will go to a back four now the Hammers.

Rudiger trues to play in Lukaku but he cannot get the ball under control. Worryingly for Wesy Ham Zouma has seemingly gone down with a hamstring injury.

Ziyech is subbed off for Hudson-Odoi.

Zouma has had a good game, another crucial block from James pass aimed at Lukaku.

Mount puts a dangerous cross in along the six-yard bix but West Ham clear. You feel there will be more goals.

GOAL FOR WEST HAM! Bowen smashes home from the edge of the box with his left foot. He leaves Mendy with no chance flailing low to his right.

A corner from Ziyech causes havoc in the six-yard box for West Ham and Antonio almost tried to get out the way of it before deflecting wide of his own goal.

Havertz has been replaced by Lukaku.

West Ham get the game restarted...

It started slowly but exploded into an intriguing game in the last third of the half. Havertz seems groggy. They will check him over the interval.

Zouma slides in to deny Havertz an opportunity to slide the ball out of play. Both players are now down receiving treatement.