Manager Carlo Ancelotti revealed the news after the Toon defeat as reserve playmaker has also joined the injury list.

"Kakuta had a problem on his leg after the tackle in first half while Benayoun's injury is his calf and Kalou hurt his thigh," said Ancelotti.

"We will know more tomorrow, but they don't look good. They will miss the next few games.

"These things can happen in football. It was a strong tackle on Kakuta and he was unlucky. The problem with his back is from the fall."

Chelsea missed key man Frank Lampard lately due to a hernia problem, but the England ace should return against City.