Arsenal's injury stricken defender Johan Djourou could be set to miss the remainder of this season, according to his manager Arsene Wenger. The injured centre half has had extensive surgery on his knee and recovery time could be anything between six to eight months. He would then need to get match fit which could extend his time out on the sidelines. His injury leaves Phillipe Senderos and Alex Song as main back up for Gallas and Vermaelen. The Arsenal boss said of Djourou's injury:"Johan is six to eight months, "He had big surgery, and it is a big blow for him and the club. He will have to be patient this season."