Arsenal defender, Chambers, up to 9 months after surgery

London, January 2 (AP) Arsenal defender Calum Chambers will be out for the rest of the season after undergoing surgery on a broken knee ligament, the club said Thursday.

Arsenal confirmed that Chambers broke the anterior cruciate ligament in his left knee during the loss to Chelsea on Sunday.

Calum had a successful surgery in London on Thursday morning, the club said in a statement.

The rehabilitation process is expected to take between six and nine months.

The injury leaves new manager Mikel Arteta with even more defensive concerns, and the Spaniard said the club could try to find a replacement in the January transfer window.

We will try to be in the market to see options that can strengthen the team, that is safe and our obligation and we will be working on that, said Arteta.

Obviously we have a serious injury with Calum a few days ago that will change our plans in the back. Arteta got his first victory over the Gunners with a 2-0 home victory over Manhester United on Wednesday, but the team is only in tenth place after a sad first half of the season that saw its predecessor Unai Emery fired. AP SSC SSC SSC