Drogba's right knee appeared to jar as he tried to get on the end of a Salomon Kalou cross, with early reports suggesting he could have a fracture and ligament damage.

The Ivory Coast striker left the stadium on crutches and with his right leg in a brace as he travelled separately from the rest of the team.

Drogba could be facing a long lay-off - and he adds to a growing list of injury concerns for Chelsea manager Luiz Felipe Scolari ahead of Sunday's Barclays Premier League game against Aston Villa.

Chelsea are already without Joe Cole, Deco and Michael Essien while Ricardo Carvalho is sidelined for another fortnight and Ashley Cole missed out tonight with lower back pain.

On top of that, John Terry finished the game holding his back and Alex also picked up a knock in a tough Champions League encounter in Transylvania.

Scolari will not know the full extent of any injuries until tomorrow, although he hopes Ashley Cole will be fit for the weekend after he missed ther Cluj game with lower back pain.

Drogba has only just returned to action after missing the start of the season with another knee injury, but Scolari revealed he did not know the latest news on his star striker because "the doctor did not answer our telephone".

The Brazilian refused to blame the Cluj pitch for Drogba's injury, telling Sky Sports: "It was not the pitch, there are normally some problems in the game, in training so we don't say the pitch is bad. Sometimes it happens in football."

Scolari insisted it was not a bad result, despite Cluj being the minnows of Group A.

"I think we didn't play well, but one point is better than zero points," he continued on Sky Sports.

"They beat Roma; they are confident; they're playing at home; they wanted to show to the people they are very good.

"Maybe for the next games they have a problem because they run and run today - fantastic. We knew this and we prepared but we missed one or two times in front of goal. Nil-nil is not a bad result today."

Drogba's injury ensured Chelsea's resources will be depleted even further for Sunday's Barclays Premier League clash against Aston Villa.

"Injuries in football are normal," Scolari reasoned.

"I need to think for the game on Sunday, how many players will I have and try to recuperate some players."

Chelsea goalkeeper Petr Cech echoed his manager's comments and praised the Romanian side for their performance.

He said: "We knew it could be like that. They proved they're a team that can play good football.

"They had a lot of motivation, a great crowd, and nothing to lose - they could play with confidence because no one expected them to get a point.

"We are, of course, disappointed because we didn't create enough. If we scored one goal it might have been different - but we couldn't do that."