Star Western Bulldogs midfielder Luke Dahlhaus will spend the next three weeks in a knee brace after scans revealed he has damaged the medial ligament in his left knee.

Dahlhaus injured his knee during the first quarter of last week’s three-point win against Port Adelaide, with the 23-year-old set to miss at least a month of AFL action.

Geelong forward Daniel Menzel is in doubt for Saturday night’s crunch clash with the Bulldogs after injuring his ankle in last week’s win over North Melbourne.