Bastian Schweinsteiger of Muenchen reacts during the UEFA Champions League group A match between FC Bayern Muenchen and SSC Napoli at Allianz Arena on November 2, 2011 in Munich, Germany.

Bayern Munich and Germany midfielder Bastian Schweinsteiger has undergone surgery on his broken collarbone and will be out of action until the New Year.

"The fracture was successfully repaired and a plate inserted in an operation performed at around 2am on Thursday morning," Bayern said after the player was injured during Wednesday's 3-2 win over Napoli in the Champions League. Bayern said Schweinsteiger will stay in hospital until Friday and must rest for two weeks after that.

"The first step in his sports rehabilitation program will be to resume jogging, before the player is cleared to resume training with the team in approximately six weeks. That in turn means Schweinsteiger will not play again this calendar year," it added.

"It's a blow, because he's been in outstanding form recently," said coach Jupp Heynckes.