French playmaker Franck Ribery is to undergo an operation on his groin on Friday in Munich, the French coaching staff announced on Thursday.

The 27-year-old Bayern Munich star, who was involved in the strike last Sunday over the expulsion of Nicolas Anelka form the FIFA World Cup™, arrived back with the France squad at Le Bourget airport north of Paris on Thursday before taking a private jet to Germany.

The French coaching staff did not specify either the exact problem or the seriousness of the injury to Ribery, whose season had been affected by a left knee injury. It completes a miserable year for the player once hailed as France's golden boy.

Ribery, who played in all three of France's FIFA World Cup group matches, was implicated in a scandal surrounding an underage prostitute and was also suspended for the UEFA Champions League final after being sent-off in the semi-final first leg match with French side Lyon.