Thomas Tuchel has admitted it is unlikely N’Golo Kante and Thiago Silva will play against Tottenham on Tuesday.
The Blues are ahead 2-0 on aggregate heading into the Carabao Cup semi-final second leg.
Kante and Silva have both been sidelined after contracting Covid-19.
“Right now I would say we have the guys we had in the FA Cup and no new injuries, which is good news for us,” he said at his customary pre-match media conference via video link.
“We have to wait on last-minute decisions on Thiago and N’Golo. They have cardiac tests and Covid tests to follow the protocols so we can bring them back to training so we have to wait to see if they can be involved and then see how they respond.
“It’s a gamble to play them so I’m not sure if we can do it and how much responsibility we can take there. We have to go step by step. I’m not even sure they will come to training but if they do, we can decide then.”