Diego Costa scored a 90-minute winner against West Ham to hand Antonio Conte his first Premier League win.

Eden Hazard gave Chelsea the lead early in the second half only to see his strike cancelled out by West Ham defender James Collins in the 77th minute.

Conte took the decision to leave Cesc Fabregas on the substitutes’ bench in favour of N’Golo Kante and Diego Costa – the Spanish international given the chance to have the final say.

West Ham boss Slaven Bilic, meanwhile, gave new £20 million signing Andre Ayew his first start for the Hammers since joining from Swansea earlier this summer.

Ayew’s first appearance ended in disappointment, however. Chasing back the lively Eden Hazard in the 34th minute, Ayew went down with a muscle injury which forced him to be substituted – much to the amusement of the Chelsea supporters.

Cesar Azpilicueta earned a penalty early in the second half which Hazard duly dispatched – a milestone goal which will go down as Chelsea’s 5000th in the top flight.

With Chelsea seemingly in control of the game, Collins netted with a half-volley after the balled bounced around following a West Ham corner.

Conte rang the changes but it would be Costa who would settle the game with his late, low strike past Adrian.

Here’s how they rated:

Thibaut Courtois – 5: Had absolutely nothing to do for 75 minutes and couldn’t do much about Collins’ equaliser.

Branislav Ivanovic – 6: Looked strong going forward but lost Collins for his goal.

Gary Cahill – 6.5: Mopped up well and didn’t give Andy Carroll an inch.

John Terry – 6: Supported Cahill and was strong in a solid Chelsea defensive performance.

Cesar Azpilicueta – 6.5: Won the penalty for his side early in the second half and defended well.

N’Golo Kantê – 7: An early booking but a solid first-up performance in Blue, distributing at 100% in the first half.

Nemanja Matic – 6: Kept working in a Chelsea midfield which dominated possession.

Oscar – 6: Managed to break up West Ham’s attack at times but was inconsistent with his distribution, particularly early.

Willian – 5.5: A disappointing performance from the Brazilian – he wasted set pieces and was replaced by Pedro after West Ham’s equaliser.

Eden Hazard – 7.5: Encouraging. Sharp in the first half and equalled his tally of home League goals from last season with a convincing penalty.

Diego Costa – 6.5: Positive-minded if not wasteful before scoring a clutch goal late to snatch three points. Fortunate to stay on the pitch after a late challenge on Hammers goalkeeper Adrian.

Substitutes

Pedro – 5: Had just 15 minutes to show his worth off the bench after West Ham’s equaliser.

Michy Batshuayi – N/A: Came on with five minutes remaining and provided the decisive touch for Costa’s winner.

Victor Moses – N/A: Replaced Hazard on 85 minutes to come on against his old side.