Arsene Wenger has revealed Theo Walcott may not take part in Arsenal's Champions League clash against Schalke on Tuesday evening due to an illness.

Walcott, who netted a hat-trick for the Gunners in last week's comeback victory over Reading in the Capital One Cup, did not start against Manchester United on Saturday.

He will be given until the day of the Champions League game to prove his fitness, but Wenger's tone suggested he is preparing to be without Walcott's services.
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