Chelsea boss Carlo Ancelotti was concerned by injuries to three of his players after his side’s 4-3 Carling Cup third round defeat to Newcastle.
Midfielder Yossi Benayoun and forwards Gael Kakuta and Salomon Kalou suffered problems in the loss.
“We will know more tomorrow but they don’t look good. They will miss the next few games,” revealed Ancelotti.
“Kakuta had a problem on his leg while Benayoun’s injury is his calf and Kalou hurt his thigh.”
Kakuta went off at half-time after a tackle by Ryan Taylor, while Kalou himself was replaced in the 56th minute.
At half-time, Ancelotti also brought Alex on for John Terry, meaning that Benayoun’s injury forced the Blues to play the final 28 minutes of the match with 10 men.
“I am disappointed with the result but happy with the performance. We had a fantastic reaction when down 3-1 and it was 10 against 11,” added Ancelotti.
“There was good spirit and personality from the young players. The game was very difficult but at the end we are happy for the performance of our players.
“The Carling Cup is not our priority. We have a very big game this weekend. We wanted to give an opportunity to our young players to improve their skills and rest some of the first-team players. I am not so disappointed.
“We did our best. I am disappointed for the result because we conceded four goals but the performance was good.”
Chelsea face fellow title rivals Manchester City at Eastlands on Saturday, with the Londoners looking to preserve their 100% start to the Premier League season.