Perth Glory midfielder Steven McGarry is confident in the side's ability to shore up its defence in time for Sunday's clash with Newcastle Jets at Hunter Stadium.

Glory produced an error-riddled display at the back in last week's first-up defeat to Adelaide United, conceding three goals in sloppy fashion.

The back four - missing injured fringe Socceroos defender Michael Thwaite - looked sluggish and reactive at times.

The performance led to a long video review session before training yesterday, but McGarry said Glory were not panicking.

"All the goals could've been stopped and that's the reason we do these video sessions, to try and pick up and learn from our mistakes," McGarry said.

"I don't think any alarm bells will be ringing yet. On the whole we've played reasonably well, there's just a couple of things we needed to tighten up in defensive areas."

McGarry said the video review session was not a blame game and Glory had taken some positives out of the loss to Adelaide.

"The way we play, we defend as a team and we attack as a team, so I don't think that you could single anybody out," McGarry said.

"I think defensively as a whole we could've done better.

"It's still very early in the season, we've got a lot of new players and Alistair (Edwards) has only been in a short time as well, so everybody's adjusting.

"Hopefully by round two or three we'll be at full strength."

Thwaite's return from a hamstring injury could be delayed another week after he missed yesterday's training session.

If fit, he would be welcomed back into the side at the expense of fellow senior defender Steve Pantelidis or youngster Brandon O'Neill.

His progress will be assessed later the week, with Glory due to leave for Newcastle on Saturday.

The Jets suffered a similar fate to Glory in round one, with defensive lapses at the heart of a 2-0 defeat to Sydney FC.

Gary van Egmond's side also lacked a killer instinct up front.

Marquee striker Emile Heskey is still sidelined by a knee injury, but the Jets will welcome back former Leeds United and Sunderland attacker Michael Bridges from a groin injury against Glory.

"We've looked at their video and saw there were a few little things that worked really well for Adelaide and we're going to try and replicate that," Bridges said.

"We may have to change our game plan a bit, but if it means breaking them down, we'll do so.

"We've been working on our shape and things early on, so I'm sure it will make for a great first home game at Hunter Stadium."