Thiago Alcântara has torn the ligament in his right knee again.

Thiago first tore a knee ligament in March before suffering a setback in May ahead of the World Cup.

Thiago will undergo surgery for the injury, which happened in training on Tuesday.

"What can I say?" Thiago told Bayern Munich's official website. "Of course, I am at the moment profoundly disappointed and upset. Why always me? But I will not give up. I will fight again. I'm going to get close again. And I will celebrate my comeback at Bayern."

Sporting director Mathias Sammer added: "We are all shocked and saddened by this re-injury.

"After a long time out, Thiago was so close to a comeback. But he knows that the whole of FC Bayern is there for him. We will do everything to ensure that he is healthy again and can bring us a lot of titles."