Bridges came off after in the first half of Wednesday night 1-0 loss to the Gold Coast with a corked thigh but tests have revealed he has been carrying a knee injury that could keep him sidelined for up to two months.

Meanwhile the Jets will also be without fellow striker Jeremy Brockie as well as Ben Kantarovski and Marko Jesic.

"We have lost Ben Kantarovski and Marko Jesic to Under 20 and under 23 rep teams respectively," Jets coach Branko Culina told the media on Friday.

"Jeremy Brockie is still recovering from his injury which is the reason why he didn't play on Wednesday but the real concern is Michael Bridges.

"He has visited the Doctor Halpin and he has been diagnosed with a chip on his cartilage so he will be out for God knows, it could be anywhere from five to six weeks or longer.

"It doesn't look too good with players availability Jobe Wheelhouse won't be back for four or five weeks, while Kaz Patafta is still recovering from his injury."

The injuries mean the Jets will most likely start with Chinese international Zhang Shou and Labinot Haliti up front with the possibility of Sean Rooney or Ali Abbas playing just behind the front two.

Veteran striker Sasho Petrovski may also get his chance, while Italian import Marcello Fiorentini, who made his debut for the club from the bench during the midweek clash with the Gold Coast is also expected to get a run in Saturday night's match at EnergyAustaralia Stadium.

In better news for the club defender Tarek Elrich is expected to return from a thigh injury.

Key defensive midfielder Kasey Wehrman said the injuries were part and parcel of professional football and said he had faith in the club's depth.

"We are missing some players but that is why you have a squad of 23 players, so it is time for those people to step up and take responsibility and get on with the job," he said.

"It is a football club so it is not all doom and gloom. We have a new owner and we have able bodies that can all run and play so there are no excuses really."

Wehrman acknowledged that the Newcastle club has been competitive this season but must eliminate any lapses as well as get more ruthless in front of goal if they are to move up the ladder.

"We have played this same type of football all year long. At the moment we haven't been able to get the results but we have been in most games," he said.

"I think we have worked hard in games but games don't last for 80 minutes they go for around 95 minutes so it is a matter of concentrating until the whistle blows."