Petr Cech faces a race to be fit for Sunday's Barclays Premier League clash with Everton after being forced out of their goalless draw with Schalke in Gelsenkirchen last night.
The Czech international goalkeeper injured his calf in the later stages of the first half of the Champions League clash and was replaced by Carlo Cudicini at the interval.
Chelsea coach Avram Grant was unsure how long Cech might be out of action but the goalkeeper limped away from the Veltins-Arena on crutches.
Grant said: ‘He could not continue in the second half. How bad the injury is we need to wait and see. It is w calf injury and I asked the doctor if he could continue and he couldn't. But Carlo Cudicini came on and played well.’
The stalemate against Schalke kept Chelsea top of Group B and they now only need to win one of their two remaining games against Valencia at home or away to Rosenborg to qualify for the knockout stage.
Had Chelsea won they would have qualified for the next phase following Rosenborg's victory over Valencia in Spain.
But Grant declared: ‘After so many good games in a short time we can have one game that is not in the high level. It is also an away game against a team who feel very good playing at home.’
