Arsenal have confirmed defender Hector Bellerin has undergone successful surgery on his ruptured anterior cruciate ligament (ACL).
The Spain right-back appeared to twist his knee against Chelsea on January 19, when he was making his first start since recovering from a calf strain.
In a medical update posted to the club's website, Arsenal said Bellerin "has now commenced recovery and [his] rehabilitation programme".
Ahead of Sunday's trip to Premier League champions Manchester City, Arsenal also had positive news on Laurent Koscielny and Henrikh Mkhitaryan.
Captain Koscielny is back in full training after suffering a facial injury in last week's FA Cup loss to Manchester United.
Mkhitaryan, meanwhile, is being assessed as the Armenia international prepares to make his comeback from a foot injury.
