Scunthorpe United are awaiting doctor's advice before deciding whether goalkeeper Sam Johnstone will face MK Dons.

The on-loan shot-stopper dislocated a finger while warming-up ahead of a training session with parent club Manchester United on Monday and as such is rated as doubtful for the weekend's League One clash.

Alan Knill says, despite the problem, the 18-year-old is keen to build on a promising start to his Iron career at stadium:mk.

But the United boss will leave the decision to medical experts, with Johnstone's long-term future paramount.

"We were there when it happened," said Knill, who took his coaching staff to watch the Red Devils' young stars train.

"Obviously we're not happy about it, but it's one of things. You can't do anything about it.

"We're still having a look at it. Sam wants to play on Saturday, but we're waiting really on the doctor telling us yes or no.

"We also have to think long term, even though the short term is probably more important.

"We'll take the advice of the doctor and do what he says."

The absence of Johnstone between the posts would be a setback for the Iron, with the talented teenager 'top drawer' according to Knill during his eight appearances for United.

He kept his first clean sheet during last weekend's goalless draw at Brentford, an occurrence which the player admitted had left him brimming with confidence.

"If there's a better young goalkeeper out there I haven't seen him yet," Knill continued.

"He's maturing all the time and I can't say his performances are getting better because he's been brilliant from day one.

"He looks like he's going to be a top goalkeeper.

"He's no problem around the place. He's always polite, does exactly what he's told and works hard."

Johnstone is not the only player facing a race to be fit for Scunthorpe's trip to face the sixth-placed Dons.

Damien Mozika is extremely doubtful after turning his ankle in training on Tuesday and Michael Collins, who only returned to action after a spell on the sidelines with tendonditis, stubbed a toe this morning.

Knill remains hopeful full-back Eddie Nolan will be fit to start on Saturday after missing last week's game with a calf problem.