London:
The Brazilian left back, one of the few first-team regulars selected for the 3-1 defeat on Tuesday, was forced off early in the second half.
Wenger says "Santos suffered a bad ankle injury. He looks like he'll be out for a while."
Left back Kieran Gibbs has been out since last month because of a hernia and may only be fit to return in three weeks. Right backs Carl Jenkinson and Bacary Sagna are also injured.
From Saturday, Arsenal plays six Premier League matches in a 24-day span.
Topics mentioned in this article
Per Mertesacker
Yossi Benayoun
Brazil
Andre Santos
Football
Chelsea
Aston Villa
Arsenal
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