Chelsea captain John Terry looks set to be out for up to six weeks after undergoing a knee operation.

Terry has been out of the Chelsea lineup for over three weeks, and it has been decided by the club's medical team that the defender now requires surgery.

The 31-year-old has been bothered by the knee since he collided with a post in a January FA Cup match against Portsmouth, but after training with the team on Monday, he woke up in pain the next day and will now miss up to six weeks according to Chelsea manager Andre Villas-Boas.

Terry's absence comes at a bad time for Chelsea, which is locked in a battle for fourth place in the league table and is winless in its last four matches in EPL play.

The England international has scored four goals in 22 league games this season but is now likely to miss crucial games with Manchester City and Tottenham next month.