Arsenal [ Images ] defender Andre Santos will undergo ankle surgery this week and is expected to be sidelined for around three months, the Premier League club said on Monday.

The Brazil [ Images ] international, who joined Arsenal from Fenerbahce in August, suffered ligament damage in their 3-1 Champions League [ Images ] defeat to Olympiakos Piraeus last week.

"Arsenal Football Club can confirm that, following investigations and subsequent medical opinions by club specialists, left-back Andre Santos will have surgery to repair ligament damage in his right ankle," the club said in a statement on their website.

The injury is a further headache for manager Arsene Wenger [ Images ] who is currently without defenders Kieran Gibbs [ Images ], Bacary Sagna and Carl Jenkinson.