But Fabian Hurzeler has confirmed Diego Gomez is fit to start against Manchester United.
The Paraguay international limped out of the win over Newcastle after taking a whack to the hip.
He was spotted in training this week.
Hurzeler said today: “I think he will be also spotted tomorrow at Old Trafford!”
Brajan Gruda, Joel Veltman and Kaoru Mitoma all missed the Newcastle game.
Decisions will be made on them after training today.
Hurzeler said: “They are all close to the team.
“Maybe one or two of them might be available tomorrow.
“We really have to go training for training because they don’t have big issues.
“It is really small issues, nothing serious, so really have to go symptom-adapted so I can’t say they will all be available, I can’t say they won’t be available.
“We have to see today how it is going and then we make a decision.”