GEELONG midfielder Jimmy Bartel will be sidelined for at least two months after scans showed a tear in the medial ligament in his left knee, which will require surgery to repair.

The 31-year-old was injured during the first quarter of Sunday's win over Gold Coast at Simonds Stadium when he collided with Suns midfielder Michael Rischitelli.

Bartel, who has played 274 games since debuting in 2002, will be operated on by renowned knee specialist Julian Feller on Thursday.

Updates on Mathew Stokes (achilles) and Tom Lonergan (concussion) will be included in Wednesday's edition of nib Medical Room.