Chelsea boss Jose Mourinho says striker Diego Costa is not fit enough to feature in all games for the Blues.
The Spain international came on as a late substitute in the 1-1 draw against Schalke 04 with the manager saying that the striker was not fit so play the full 90 minutes.
"Costa has a problem," Mourinho told reporters after the game.
"He came to us [from Atletico Madrid] and he was completely fine.
"He had a problem again in the national team, not with us.
"If he has one week to let the muscle recover he can start a game. Playing on Saturday, three days is not enough for him to recover.
"It was not to protect for the game Sunday, it was because he was not in condition to start the game.
"Now we have the problem and now we have to resolve the problem the best we can.
"He was not in condition to play. Sunday we believe he is.
"Next week against Bolton [in the Capital One Cup], for sure he isn't.
"We have to manage the situation until the moment he's completely fine."
