JASPER Pittard suffered a hamstring injury during the third term Power's JLT clash against the Crows on Saturday.
Senior coach Ken Hinkley said it was a typical hamstring injury that would see Pittard out for up to three weeks.
"Looks like a hamstring, pretty simple, he won't play round one," Hinkley said post-game.
With Pittard's injury comes the opportunity for another defender to put their hand up for selection in Round 1.
This could come from Trent McKenzie, who played a solid half in his first competitive hitout at Alberton on Saturday.
McKenzie didn't play against West Coast in the Power's first JLT game a fortnight ago, or in the first half against the Crows, but looked at home across half-back when injected into Saturday's contest, finishing with 10 disposals.
The 25-year-old played 106 games with Gold Coast before joining the Power as a delisted free agent.
"Trent McKenzie was really strong in the second half when we put him out there," Hinkley said.
"We had nine defenders out there so it's going to be tight, but it's what we want - performance pressure."
More on portadelaidefc.com.au...