West Ham United can confirm that Valon Behrami is expected to be out for six months with an anterior cruciate ligament injury in his left knee.
The 23-year-old midfielder was hurt during the 1-0 visit of Manchester City on 1 March and underwent keyhole surgery in Italy to assess and then repair the damage on Tuesday after two previous MRI scans. Behrami is due back in London next week, where he will begin his rehabilitation with the club's medical staff as soon as possible.
Behrami was injured in the 38th minute against City, bringing to an end a tremendous run in the West Ham United side since his high-profile arrival from Lazio last summer. The Swiss international has made 27 appearances in all competitions, scoring two goals. The club are still waiting for more news on fellow midfielder Jack Collison, who injured his right knee against Wigan Athletic on 4 March.
Meanwhile, Luis Boa Morte is back in full training after a groin injury and Kieron Dyer is taking part in some sessions with the rest of the squad after overcoming his calf trouble. James Collins (hamstring) and Diego Tristan (groin) are both running and are thought to be close to joining in fully as well. Long-termers Danny Gabbidon (abdomen/back) and Dean Ashton (ankle) continue to work on their rehabilitation.