Winston Reid and Cheikhou Kouyate joined a growing list of absentees for West Ham United ahead of Saturday’s game with Norwich City.

The extra-time victory against Liverpool in the FA Cup came at a cost for the Hammers with Joey O’Brien joining Reid and Kouyate in being replaced during the second half of the match at Upton Park.

James Tomkins was forced off on Saturday at Southampton with a calf injury that will sideline him from action for six weeks leaving Slaven Bilic short defensively.

West Ham head of medical and sports science Stijn Vandenbroucke provided an injury update.

He told the club's website: “Winston Reid and Joey O'Brien both picked up injuries to their left hamstring and will have a scan on Thursday.

“Cheikhou Kouyate lost consciousness during a challenge with Liverpool defender Jon Flanagan.

“He came off the pitch with mild concussion and was taken to hospital to clear any further problems. He was cleared by a specialist and is fine now.

“The rules stipulate that when a player is concussed, they cannot have significant physical activity for the next six days so he will miss the weekend game against Norwich.

“Hopefully if everything is okay we can get him fit for the FA Cup fifth round tie against Blackburn Rovers.”

There was, however,  more positive news regarding the return of Manuel Lanzini and Diafra Sakho from long-term injuries.

Vandenbroucke added: “Lanzini is only a few days away before re-joining the team.

“Sakho is not far behind him but he needs more work because he has been out for around ten weeks so he will have a period of extra fitness work under his belt.

“We hope to see him back in action by the end of the month.”