CARLTON power forward Harry McKay will face North Melbourne on Saturday, after a delay in his COVID-19 test results was revealed as the reason for him missing training.

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McKay has kicked consecutive hauls of three goals and is returning to his best form since a groin injury sidelined him in round one and restricted his pre-season.

The AFL informed the Blues on Thursday that the 22-year-old's test results hadn't come back yet and he wouldn't be able to train with his teammates until that occurred.

However, coach David Teague said on Friday there was no concern with McKay's health and he instead completed a solo session.

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"It was really disappointing, because obviously we wanted Harry out there to train and to get through training," Teague said.

"He came back to the hotel here and did a training session by himself once he got those results back that he was clear.

"There's no problem there – it was nothing to do with his test. It was to do with the laboratory. I'm not sure exactly what happened, to be totally honest, but he had no concerns with his health or anything like that.

"As long as he's pulled up well from that session (he will be fine to play). He did it by himself, which was a bit hard and we don't know exactly what he did, because he wasn't with the whole group."

Teague said reports McKay was dealing with a hamstring injury were incorrect.

He also confirmed two Carlton footballers, Liam Stocker and Matthew Kreuzer, had left the club's Queensland hub to return to Victoria.

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Stocker left for personal reasons and it is unclear when or if he will return, while Kreuzer did so to continue his rehabilitation from a foot injury.

The Blues' medicos were keen for the veteran ruckman to start using an AlterG anti-gravity treadmill, which they didn't have access to.

"It's one of the great pieces of equipment that's probably changed the way we bring players back from injuries over the last five to six years," Teague said.

"(Kreuzer's injury) is tracking pretty well – it was a reasonably big injury. I haven't had a timeframe for when he'll be back.

"But what I have loved is the energy he's brought to the group. He's really put his arms around our ruckmen and become more of a coach, which has been outstanding."

Teague was responsible for brokering the round nine fixture change with the AFL for Carlton and Hawthorn.

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They will now play each other in Perth next Friday night, instead of the previous day, after which they have an extended break while serving their quarantine period.

"It wasn't a benefit to us or Hawthorn; it was more for the players' sake and I just asked what the rationale around it was," Teague said.

"To the AFL's credit, they came back and said, 'Yeah, fair point'. There was no real reason we had to play on the Thursday, so they moved it to the Friday. 

"It just gives the players one extra day to recover."