The Western Bulldogs have revealed the results of Josh Bruce's scans, announcing their defender has ruptured his ACL.

Bruce fell victim to a right knee injury during Saturday afternoon's loss to the GWS Giants at Mars Stadium in Ballarat.

The incident, which saw Bruce land awkwardly in the defensive half of the ground, occurred in the third quarter of Saturday's contest. Bruce exited the playing field and took no further part in the game.

The Bulldogs officially announced Bruce's injury fate on Monday afternoon.

Bruce isn't a stranger to the dreaded ACL injury, having suffered an identical injury in his left leg two years ago.

Following Monday's news, the defender-forward hybrid will undergo surgery and won't play again this season.