Arsenal defender Johan Djourou is certain to miss at least six weeks according to manager Arsene Wenger.
The Swiss international dislocated his shoulder in Saturday's FA Cup loss to Manchester United and will undergo surgery on Monday.
Wenger said it will be six weeks at the least despite the Swiss Football Association saying the injury is not all that serious.
"He has an arthroscopy on Monday and we will know more about the damage in his shoulder," Wenger said. "We hope we will have good news, but no matter what happens he will be out for six weeks."
