Cesc Fabregas is doubtful for Saturday's north London derby against Tottenham after coming down with a virus.
Arsenal manager Arsene Wenger said a decision will be made on the Spanish midfielder tomorrow.
Freddie Ljungberg is also doubtful for the Premiership match at White Hart Lane with a hamstring injury.
Wenger told Arsenal TV Online: "Cesc has a little sickness. He will have a test tomorrow to see how he feels. As it stand he is 50:50 today. We will not gamble on him. He is not injured but he has caught a virus.
"Freddie Ljungberg is a major doubt as well but we have not lost anybody else from Tuesday."