Arsenal have confirmed that David Luiz has undergone surgery on his right knee and will return from fitness 'in the upcoming weeks'.
The Brazilian centre-back missed the Gunners' 3-0 home defeat to Liverpool on Saturday night, with Mikel Arteta admitting he was unsure as to whether Luiz would feature again this season.
The centre-back, who turns 34 this month, now faces a race against time to get back fit in time for the rest of the season, with the Gunners hoping to enjoy success in the Europa League and the final eight matches of the Premier League season.