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Brisbane Roar have suffered a big blow ahead of its trip to Wellington, with goalkeeper Michael Theo ruled out through injury.

Brisbane coach John Aloisi confirmed that Theo will miss this weekend's match with a quad strain, with back up keeper Jamie Young coming into the starting line-up.

"Jamie will just slot in and I am sure he will do a great job," Aloisi said.

"He's been training really well. Even when he didn't start in the first two game he's didn't put his head down.

"He just kept going and that shows the rest of the players to keep working hard because you don't know when the opportunities comes up and he (Young) gets that this weekend."

With Theo ruled out with injury, 18-year-old goalkeeper Andre Jannese will be added to the match day squad.