Vidmar has come under pressure from some fans after the team looks to have missed the finals series for the first time in A-League history.

Vidmar took the helm after now-Sydney coach John Kosmina was sacked over last year's grand final debacle.

Under Kosmina, the Reds won the Premiership in the first year of the A-League and took his side to the grand final.

Vidmar though has been plagued by injuries which have ravaged United backline and despite a good mid-season run, the team has faded badly in the run-in to the finals.

But Fontanarosa insists the club will not be getting rid of Vidmar and are now focusing on the Asian Champions League.

"Our goal is to be in the top-four every year," Fontanarosa told the Adelaide Advertiser. "In my opinion we failed. That doesn't mean let's sack the coach.

"He's not going anywhere. We've had a bit of bad luck with injuries but there's so much learning still to be done. This is certain to make Adelaide United a stronger club."

He added: "I will get together with chief executive Sam Ciccarello and Viddie plus a couple of other people to discuss the positives and the negatives of the season.

"Everything will be under scrutiny from the team, the fitness, soft tissue injuries and of course what we can do for our members and supporters and how we can further grow.

"What can we do better – that's the focus. There's always going to be changes. As far as players that's Viddie call.

"But changes, we might need more help and we'll assess if we require part-time or full-time staff.

"It's a process which needs to be done."

United are now aiming to reach the quarter-finals of the ACL when the competition begins in March.

"Last year the (ACL) was a big learning curve for us," said Fontanarosa. "This year we want to go one or two steps further."

Vidmar was yesterday fined a reported $2500 and sanctioned for his verbal attack on referee Matthew Breeze after United lost 3-1 to Sydney FC at Adelaide Oval.