McDonald, 26, injured his meniscus in the third quarter of Melbourne's nail-biting win over Carlton on Sunday afternoon.

Before going down, McDonald had put together a best-on-ground performance, kicking six goals and tallying 20 disposals. His goal-kicking haul equaled the most major scores in a game of his career.

McDonald was hopeful after the game that the injury wasn't too serious.

Watch McDonald speak about the injury after the game below:

"It's not too bad I don't think," he said.

"It is frustrating because I think I'll miss a couple of weeks... I just felt a bit of a 'clunk' in it, maybe chipped a little bit of bone off or a little tear of the meniscus maybe but fingers crossed I think we dodged some serious damage."

Demons coach Simon Goodwin praised McDonald's play speaking to media after the game.

"He was obviously outstanding in the game, but it looks like a meniscus in his knee, so we'll get that scanned," Goodwin told reporters.

"He was terrific today, so it's disappointing for us, but hopefully the scan will come back and it's not too bad, but we'll have to wait and see on that one."

The Demons sit in 16^th on the AFL ladder after the win over the Blues.

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