Adelaide United travels to Newcastle to take on the Jets on Sunday and coach Aurelio Vidmar is wary of the reigning premiers. Even though the Jets have won just one match in their past seven but Vidmar has had enough experiences against Newcastle to know it won't be an easy match.

"We need to consolidate from our win last week going into the next two games. I still think that they (Newcastle) have the best footballing side, and when you look at the squad they have assembled even without Milligan and Joel Griffiths, that's still a very good squad so it's certainly not going to be easy," Vidmar said.

"They're coming off a loss last week and they will be really keen at home to try and take maximum points so we're up for a tough game."

The Reds had a slight scare at training yesterday when Brazilian defender Cassio left the pitch with calf soreness.

Vidmar said they would have to monitor his situation.

"We think it's nothing but just for precautionary measures we sent him to the doctor so we'll see how he goes," Vidmar said.

"We'll have to see what the prognosis is once he comes back from the doctor if he's alright he will start on the bench."

Defender Robert Cornthwaite has been given a place in the Reds squad along with Michael Valkanis, midfielder Jason Spagnuolo and striker Robert Younis.

The Jets will be without two key players in striker Joel Griffiths and defender Mark Milligan but welcome back Kaz Patafta, Jobe Wheelhouse, Antun Kovacic and Shaun Ontong.