Melbourne Victory coach Kevin Muscat is refusing to panic after his side's third successive lose, and said they did not deserve to drop all three points on Wednesday night against Perth.

The Glory recorded a 1-0 upset win over the reigning champions at NIB Stadium last night, resulting in Victory first three game losing streak since February 2013.

Substitute Diego Castro broke the deadlock in the 74th minute after a brilliant run from 17-year-old Jamal Reiners.

"It's difficult to take really because we certainly didn't deserve to lose," Muscat said.

“We had domination with the ball and naturally when the opposition drops as deep as Perth did, you know, chances are going to be limited.

“We possibly didn't capitalise on the amount of times we got in decent positions...and when you get a good chance, you've got to take it.

"Bes has hit the underside of the crossbar and if he scores there, then they've got to change their whole strategy and structure, which would leave them vulnerable.”

But Muscat said that his side is not worried about their recent results, instead turning their focus to Saturday night's derby against Melbourne City.

“If you start worrying about the outcome, you'll miss something.

“Our objective now…is to give the group as much knowledge as possible and get them recovered and give them everything they need to go out and perform on Saturday.

“We'll leave the worrying to someone else. We've just got to make sure we get our performance right.

"There's a couple of games on the bounce now where we shouldn't have lost the game, but it has occurred."

Muscat did not garantee that Archie Thompson will return on Saturday night, but said that he has been training well.

"He's trained very well over the last two weeks, he's stepped it up in the last six, seven days...he'll train with the group on Friday and we'll make a decision from there."