Jack Collison could miss West Ham's Wembley play-off final after Sam Allardyce admitted his shoulder injury "doesn't look good".
Collison went down under a heavy challenge from Cardiff's Ben Turner early in the second half of Monday's Championship play-off semi-final victory over the Bluebirds.
The 23-year-old's shoulder was dislocated in the incident, casting a huge doubt over his involvement in the Wembley game against the winner of Wednesday's tie between Birmingham and Blackpool.
Allardyce admits he is praying that Collison can recover after playing a pivotal role in the Hammers' two-legged win over Cardiff.
"It doesn't look good unfortunately for us," the West Ham boss told Sky Sports.
"I think he rolled over and I'm told the shoulder popped out.
"The good thing is that it went straight back in again.
"We can only hope and pray because he's been outstanding in the last two games for us."
West Ham are awaiting the results of a scan before knowing whether the Wales international will be ruled out of the Championship play-off final on May 19th.