Chelsea full-back Jose Bosingwa will miss the rest of the season and the FIFA World Cup™ with Portugal as he requires further surgery on a knee injury, the Premier League club have confirmed.

Bosingwa had been back in light training after knee surgery but has now been ruled out for the season because another operation is required.

That means he is unavailable for Chelsea's challenge for a treble of Premier League, FA Cup and UEFA Champions League. It also means he will not be able to play for Portugal in the FIFA World Cup Finals in South Africa.

Chelsea assistant boss Ray Wilkins confirmed Bosingwa, who has played 57 games for Chelsea since signing from Porto for £16.2million in May 2008, needed a second operation.

The 27-year-old right-back suffered the injury against Aston Villa in October. Wilkins said: "Bosingwa will be out for the season. He will have another operation on his knee and that is him out of the World Cup as well."