Lycett battled a sore left knee in the last month of the season. He did some damage to his PCL midway through the season but played on.
He suffered several knocks that hampered him in the last two rounds of the home and away season and the elimination final where he hobbled off early in the second term against the Bulldogs after hurting the knee while laying a tackle.
The Eagles have confirmed Lycett needs some kind of surgery but the extent of the operation is unclear.
AFL.com.au understands that the normal course of action for a partial PCL tear is rest and recovery but a complete tear would require a reconstruction that could rule him out for anywhere between six and 12 months. Any meniscus or cartilage damage would also be concerning going forward.