Chelsea could lose Cesc Fabregas for their Premier League clash with Manchester City this weekend.
Cesc was forced off in Chelsea's Capital Cup semi-final win over Liverpool.
The midfielder collided with Blues team-mate John Terry at the beginning of the second half and was replaced by Ramires. He headed straight down the tunnel to receive treatment on a hamstring problem.
Filipe Luis and match-winner Branislav Ivanovic also picked up knocks.
"Branislav was able to continue but the others weren't," said Blues boss Jose Mourinho.
"Filipe Luis came off with a calf problem and Fabregas reported a tight hamstring. Fabregas said he wasn't yet injured but that he would be soon if he continued."
