Harry Redknapp is waiting on the fitness of Heurelho Gomes and Ledley King ahead of Wednesday night's (May 5) crunch match at City.
The big question is whether or not Ledley's troublesome knee will settle down in time to play two matches in the space of five days after another fine display against Bolton on Saturday.
"It's a case of waiting to see how he is and how he recovers from the weekend," said Harry before training on Tuesday.
"He will come out today and have a loosener with us and then we'll make a decision.
"I'll leave it to Ledley. If he feels he's fit and he's up for playing, he'll tell me. If he's not quite right, he'll tell me. He knows his body and how his knee is feeling and he will let me know."
Goalkeeper Gomes picked up a groin injury in the final minutes of Saturday's 1-0 win against Bolton.
"Again, we'll see how he is today," said Harry. "He didn't train yesterday (Monday) and he won't do too much today.
"He's been top drawer, a fantastic goalkeeper but if he's not fit Ben Alnwick will play and Jimmy Walker will be on the bench.
"We hope he's fit because he's important to us. I'm hopeful."
Vedran Corluka (ankle) is still out alongside long-term absentees Niko Kranjcar (ankle), Jonathan Woodgate (groin) and Carlo Cudicini (wrist, pelvis).