Carlton are yet to settle on a squad to face Melbourne on Thursday night as several players look to press their case for a recall.

The Blues put Jack Martin and Mitch McGovern to the test on Wednesday, hoping the duo can prove their fitness following hamstring injuries.

McGovern has been sidelined since the club's Round 5 loss to Adelaide, while Martin hasn't featured yet this season due to a troublesome hamstring injury.

The pair's potential returns come as defender Zac Williams also looks to overcome flute soreness, which limited the former Giant in last Friday's loss to Collingwood.

"They're all very likely. They're running through their testing today," coach Michael Voss said of those needing to get through Wednesday's captain's run.

"We've got to get through that part before we can confirm any availability, and then it's just asking where they play.

MELBOURNE, AUSTRALIA - MAY 03: Zac Williams of the Blues is seen on the bench after being subbed out of the game during the 2024 AFL Round 08 match between the Carlton Blues and the Collingwood Magpies at The Melbourne Cricket Ground on May 03, 2024, in Melbourne, Australia. (Photo by Dylan Burns/AFL Photos via Getty Images)

"Do we bring some of those guys through the VFL, or do they play AFL? That'll be the determining factor after that.

"What our high-performance team and training environment provides is that they're ready to go. Anyone we put out there, we feel that they've done enough of the work.

"Planning is very precise, we're able to expose them to a game-like environment that gets them ready. If we feel like they're ready to go for the AFL, it's because we feel like they've got the adequate preparation to be able to get out there and get the job done."

Defender Caleb Marchbank is also in the mix after being cleared to return following a recent back injury and illness, with Voss to weigh up a potential change to his backline outside of Williams' potential absence.

According to reports, Williams worked through a limited session on Wednesday, while Martin, McGovern and Brodie Kemp all took part in training.

Kemp did not feature against the Magpies after being omitted from Voss' side and could earn a return, with fellow defenders Marchbank and Lewis Young also not spotted.

The Blues could call on Kemp to replace either Williams given his flexibility as a medium-sized defender, while McGovern looms as a likely replacement for Young if deemed fit.

Martin could come into Voss' for one of Orazio Fantasia or Corey Durdin, who combined for just 12 disposals, two tackles and no goals in last week's loss.

The potential changes come as Melbourne look to make at least one unforced change, bringing defender Jake Bowey back into the senior side following eight weeks out of action with a shoulder injury.

Carlton and Melbourne will confirm their 23-man squads at 6:20 pm (AEST) on Wednesday.