Igor Julio has been ruled out for the rest of the season with a hamstring injury.
The centre-back suffered the injury during our 1-1 draw with Arsenal earlier this month and has undergone surgery.
"Igor will be out for the rest of the season," head coach Fabian Hurzeler confirmed on Tuesday. "It was a hamstring injury. He needed surgery, so it was a big thing."
The Brazilian has made 12 Premier League appearances so far this campaign.