Port Adelaide defender Tom Jonas will miss at least four weeks of action due to a knee injury sustained against St. Kilda on Saturday.
The 27-year-old, arguably in career best form hurt his left knee in a tackle and limped off the ground.
Jonas will have arthroscopic surgery within a day to remove floating loose body from the joint within the knee and could miss as many as six weeks.
Jasper Pittard is a chance to return for the Power after sitting out the game against the Saints with a sore hamstring and will need to prove his fitness.
