Geelong midfielder Mark Blicavs will miss at least one month of football after suffering a fracture and ligament damage to his ankle in Friday night's loss to the Crows at Adelaide Oval.

Blicavs fell awkwardly underneath Adelaide midfielder Rory Sloane during the third quarter, and was helped off the field and didn't return to the action.

Scans on Monday confirmed the extent of Blicavs' injury, with the club saying the 26-year-old should be fit to play during the finals, but not earlier.

"Specialist opinion received today believes the best course of action is to allow the ankle to heal naturally, and as such Blicavs will not undergo surgery. He is expected to be available for selection in September," a Geelong club statement said.

Blicavs has played 16 games so far in 2017, and has averaged 16.5 disposals, 4.2 marks and 4.5 tackles per game.