North Melbourne will be sweating on the fitness of midfield bull George Wardlaw after he left the Round 17 clash with Port Adelaide with an apparent hamstring injury.

Senior coach Alastair Clarkson said the Kangaroos will await further details to determine the severity of the 22-year-old’s injury.

“We’re not sure; he went off with a hamstring, so we’ll get that assessed during the week,” Clarkson said.

Midway through the final term, Wardlaw sprinted to apply pressure on Power defender Darcy Byrne-Jones but clutched at his left hamstring shortly after and made his way to the bench.

It’s a frustrating blow for Wardlaw, who has struggled with soft tissues throughout his young career.

It added an extra layer of disappointment for the 8-8 Kangaroos, with Clarkson disappointed in his side’s overuse of the football.

POWER v KANGAROOS Full match coverage and stats

“It was a real arm-wrestle, and they won,” Clarkson said.

“They got three goals up at half-time, and we arrested that momentum and got back to even keel at three-quarter time, then we gave them back the three goals again.

“At Adelaide Oval you need to take territory and take your chances to move the ball and at different stages we just over-possessed the ball.

“We won contested and uncontested possessions for the game but just didn’t use it in a manner we needed to in terms of getting it forward quickly enough.”