Brisbane are sweating on the fitness of Alex Glenn ahead of Sunday’s NRL elimination final against St George Illawarra, giving the back-rower until their final training session to overcome a calf complaint.

The Broncos hosed down concerns for winger Corey Oates (calf) and key forwards Tevita Pangai (hamstring) and Joe Ofahengaue (leg) after leaving training early on Thursday.

However, Glenn is no certainty after suffering a calf strain at training last weekend which forced him to miss the Brisbane’s last round 48-16 demolition of Manly.

The Kiwi international was restricted to light drills on Thursday.

“Calf muscle injuries can be tricky so we were always going to be careful with this one,” Brisbane high performance manager Jeremy Hickmans told Broncos TV.

“Alex will continue with his rehabilitation and treatment over the next couple of days and we will assess him on Saturday before the final training session.”

Hickmans said Oates, Pangai and Ofahengaue were “not in any doubt” for Sunday.

Hooker Andrew McCullough will also definitely play after recovering from a heavy concussion suffered in a tackle by Sydney Roosters enforcer Dylan Napa.

McCullough’s Queensland teammate Napa copped a three-match ban for dangerous contact.

“The head feels good. It’s good to have a bit of a break. It was a blessing in disguise this time of year,” McCullough said.

“I was a bit light headed the next day but that was it, I just got on with it.

“I remember taking the ball up and then I came to in the sheds. I didn’t really know what happened but I remember the game.

“Overall I was pretty good considering what it looked like.”

McCullough said he did not hold any grudges.

“He didn’t intentionally mean to hit me in the head, I know the type of guy he is,” he said.

“He has served his time. I don’t hold any grudges. It happens in footy.

“Dylan has apologised that amount of times I will just move on.”