Key Essendon midfielder Andrew McGrath could miss the rest of the AFL season after suffering a serious knee injury.
McGrath was subbed out in the first quarter of Saturday night's Dreamtime game defeat to Richmond.
Scans have confirmed a posterior cruciate ligament injury in his left knee, with the former No.1 draft pick to be sidelined for between eight and 12 weeks.
Even in the best-case scenario, McGrath won't return until the Bombers' round 21 game against the Western Bulldogs.
"We are really disappointed for Andy who was putting together a consistent season to date as part of our midfield group," Essendon football manager Josh Mahoney said.
"Andy is a true professional who will be very driven to see a return to play as soon as possible.
We know he will attack his rehabilitation program and continue to contribute to the team while not playing."
McGrath has played 90 games for the Bombers since his debut in 2017 and has become a reliable member of the club's midfield.
The Bombers (5-7) have a bye next round and are scheduled to take on Hawthorn at the MCG on June 20.