Duncan had been arguably Geelong’s best player in the first half of the 14. 7. (91) to 8. 9. (57) win at GMBHA Stadium, before he was subbed off following a tackle from Suns defender Nick Holman.
The incident occurred in the final minute of the first half when Duncan was chased down on the wing by Holman as he attempted to dispose of the ball, with the tackle resulting in the Cats star’s head hitting the turf.
Duncan was left dazed by the tackle and laid motionless on the turf before staggering to his feet and being helped off the ground.
The tackle resulted in Duncan being substituted off early in the third quarter with Zach Guthrie coming on for the Cats.
“Slammed his head into the dirt,” AFL great Gerard Healy said of the tackle on Fox Footy.
“It was actually the perfect tackle because he twisted him. I think what happens is he grabs his arm and there’s no way that Duncan can protect himself.”
While Duncan was left concussed by the tackle, it is unlikely that Holman will face a sanction, with Bulldogs great Brad Johnson labelling the incident “unfortunate”.
“It’s just an unfortunate accident,” he told Fox Footy.
“He tried to step away a couple of times to push off the doctor, but he wasn’t steady on his feet at all.”
Duncan’s concussion wasn’t the only injury concern for the Cats, with All-Australian midfielder Cam Guthrie suffering a shoulder scare, although he was able to run out the match after getting his shoulder re-strapped.
The win leaves Geelong 3rd on the AFL ladder, and the Cats will be hot favourites to extend their run of form against Collingwood in Round 11.