By Dominic Toner

Jack Sullivan, son of West Ham co-chairman David Sullivan, has praised the performance of debutant Arthur Masuaku.

The defender started for West Ham on Monday night following his summer move from Olympiacos but couldn’t help his side avoid a 2-1 defeat to Chelsea in the opening league fixture.

Chelsea dominated possession and the tempo for large parts of the game but Masuaku looked assured on his Premier League debut.

Sullivan has posted a message on Twitter praising the performance of the 22-year-old new signing.

The Hammers lost to a last-minute winner from Chelsea’s Diego Costa, who fired a shot past goalkeeper Adrian from the edge of the box. James Collins had equalised for the Hammers after Eden Hazard had given the home side the lead from the penalty spot.

Michail Antonio endured a night to forget as man of the match Hazard kept him constantly under pressure all night until Slaven Bilic substituted him off.

The converted right-back was at fault for conceding the penalty after he committed  a mistimed challenge on Cesar Azpilicueta.

Another West Ham debutant Havard Nordtveit suffered a more difficult introduction to the Premier League and struggled with the Chelsea midfield N’Golo Kante, Oscar and Nemanja Matic, prompting the club’s supporters to express their disappointment of his performance on Twitter.

Bilic had been publicly chasing a left-back for some time following first-choice left-back Aaron Cresswell being ruled out for up to four months with a knee injury.

His replacement Masuaku arrived at West Ham this summer having won back-to-back title with Olympiacos and making 12 appearances in the Champions league.

The Frenchman made 74 appearances in all competitions for the Greek side, scoring two goals and picking up nine assists.

In other West Ham team news, Mark Noble has revealed the incredible training-round skill from the club’s new star.