SYDNEY Swans midfielder Dan Hannebery suffered a medial ligament injury to his left knee in the final quarter of Saturday's Grand Final loss to the Western Bulldogs.

Hannebery was contesting a ball with Bulldogs skipper Easton Wood, who slid in and collected the Swan's knee, forcing him from the ground in the hands of two trainers for treatment.

The tough Swan had the knee strapped up and reappeared soon after, but was hobbling noticeably.

Swans coach John Longmire confirmed the extent of the injury.

"It was a pretty big hit to his legs, so unfortunately I think he might have done his medial," Longmire said.

When asked whether he thought it should have been a free kick, the coach was measured.

"I don't know. Do you guys think it should have been or not?

"The Doggies were good. In the end, all we can ask for is they (free kicks) get paid both ways, and I'd have to sit back and look in the cool light of day to comment on that."

Hannebery in the hands of the trainers after injuring his knee. Picture: AFL Photos