Chelsea striker Didier Drogba was the subject of an injury scare during his side's warm-up ahead of their match at Tottenham Hotspur.
The Ivorian, who is due to start the match, appeared to hurt his knee as he hobbled around the White Hart Lane pitch.
Drogba then had to sit down before he continued the pre-match preparations.
No indication has yet been given over whether he will withdraw.