GEELONG, AUSTRALIA - JULY 08: Mitch Clark of the Cats (L) competes for the ball against Callum Sinclair during the round 16 AFL match between the Geelong Cats and the Sydney Swans at Simonds Stadium on July 8, 2016 in Geelong, Australia. (Photo by Michael Dodge/Getty Images)

Swans ruckman Callum Sinclair sidelined for up to a month

Sydney has suffered another injury to its ruck department, with Callum Sinclair succumbing to a knee injury.

Sinclair injured his knee in a marking contest during the Swans’ win over Carlton on the weekend.

The 26-year-old played out the match, however, scans later revealed a fragment of cartilage had broken in his knee.

“Callum suffered a little discomfort during and after the game, so he had a scan immediately after that,” Sydney general manager of football Tom Harley said.

“The scan revealed some cartilage had broken off in his right knee, so he underwent arthroscopic surgery on Tuesday morning to remove some of that floating cartilage.

“We won’t know the full prognosis until he recovers from the surgery, but we are hopeful he will be able to return within a month.”