A goalless draw with Perth Glory wasn't enough to secure a final spot.

Vidmar said: "I thought after the first half the game should have been more or less all over with the chances we had but that’s the way it goes sometimes.

“I was fairly pleased with the first half, we just lacked a bit of quality in front of goal.

"The boys were heavy in the legs after half time because they had a hard week at training leading into the game, so now we will just taper off a bit and get ready for Round 1.

"I think over the three games we've moved forward, we've evolved. Just lacking a little bit of quality now. There was a fair bit of movement in the first half which was good, but unfortunately the execution in front of goal wasn't there. We just need to sharpen up a little bit in front of goal."

It's been a pre-season about processes rather than outcomes for Vidmar and his men, especially integrating several new players, including Cristiano, Alemao and Scott Jamieson.

"It's understandable, the more games they play together, the better they'll be. It's going to take a little bit of time. We would have liked a couple more games before the season, but that's just the way it is. I'm sure once the season starts, with the extreme intensity and the pressure of the A-League, they'll be better for it," he said.

Adelaide play Perth in the opening match of the Hyundai A-League season in just two weeks, but Vidmar is not expecting that match to be anything like the Mt Gambier clash.

"It's certainly going to be different circumstances. Even with Melbourne and Newcastle, who we played over the last couple of weeks, had five or six players out," he said.

"They will obviously be a lot stronger. You have a look at Perth today, they were missing some big players as well, you can't read too much into it today."