Collingwood's Brayden Maynard has called his hit on Angus Brayshaw a 'footy act' following a sickening collision at the start of the Magpies' victory over the Demons on Thursday night.

The two came together less than five minutes into the opening quarter of the first qualifying final at the MCG, with Brayshaw being stretchered off the ground.

The Demons were running forward out of the middle when Brayshaw attempted to kick downfield.

Maynard left the ground in an attempt to block the kick, Brayshaw got the ball off and the Magpies player's momentum carried him forward through the air.

Maynard's shoulder collided with Brayshaw's head. The Demons midfielder — who has had previous problems after several concussions, and has worn a helmet for several seasons — was laid flat on the ground without moving for a minute.

His furious teammates surrounded Maynard, as medical staff treated Brayshaw. The Collingwood player was put on report.

Maynard was asked after the game about the collision and whether he thought he could be in trouble for the hit.

"I don't want to say too much, but it's a footy act. I came forward, I jumped to smother the ball and yeah, unfortunately I just got him on the way down," he told Channel Seven.

"So I don't know. We'll have to wait and see what happens.

Brayshaw gave a thumbs-up to the crowd as he was stretchered off the field, with Melbourne coach Simon Goodwin confirming Brayshaw was moving and talking in the rooms at half-time.

Melbourne coach Simon Goodwin was visibly unhappy with the incident in his post-match press conference, but stopped short of saying Maynard should be suspended.

"It'll be sorted out during the week, but we've got a pretty shattered player in there," Goodwin said.

"You can only go by the facts. He jumped off the ground and knocked a guy out. I guess time will tell."

If the incident is ruled a football action, with no other option for Maynard, then the Magpies player would be likely to escape sanction.

However, if the match review officer Michael Christian, rules that Maynard left the ground and hit Brayshaw high, leading to concussion, then Maynard could face a ban of two or more weeks, which would end his season.

The Demons are also at risk of losing a player to suspension.

In another first quarter incident, Melbourne forward Jacob van Rooyen hit Collingwood's Dan McStay with a high elbow.

McStay went off the ground and was given a HIA assessment, but returned to play on.