Glory started the season in superb fashion collecting 11 points from their first five matches before defeats to Gold Coast United, Newcastle Jets and Adelaide.

Mitchell said, though, he was heartened by Perth's performance against league leaders Adelaide on Friday night.

"From our point, the performance was good and it could've gone the other way," he said. "I'm not too disappointed with that.

"Last week I was bitterly disappointed with the way we played, but tonight was much, much better and we just pick ourselves up and look for the home game next week."

He added: "Adelaide are a very good side, well organised and can cause you a lot of problems and I think we coped with it well tonight."

Mitchell rued Adelaide shot-stopper Eugene Galekovic's quality after he twice denied the Glory in the first half.

"I think he's the best keeper in the league and he's made fantastic, two world-class saves and kept them in the game at that point," he said.

"I thought in the second half we played well, we were containing Adelaide, there wasn't too many problems and it was going to be a very interesting finish.

"Then it was probably a bit of sloppy defending by us, a cross has come in and the player's got the header in and it's looped over Tando and gone in. Then you're chasing the game and then the penalty decision, 2-0.

"I think the performance was a lot better than last week. It was a little bit unfortunate the way things panned out tonight, it could've gone either way."

Glory milestone man Jamie Harnwell was disappointed with the result.

"Things just don't seem to be going in for us at the moment," Harnwell said.

"It's disappointing. The lads worked hard and did all they could but just couldn't do it in the front third."

Perth Glory's next game is at home to Brisbane Roar on Sunday.