In just a week, new Brisbane Roar coach Nick Green has instilled a belief in his squad that "nothing is impossible" with the finals still in reach.

After taking over from sacked coach Warren Moon, the new mentor has brought an up-tempo style of play to the side and drafted in young players like exciting winger Jez Lofthouse.

Green was rewarded with a 2-1 A-League Men win over Perth Glory, breaking a seven-game winless streak.

The Roar have a danger game away on Sunday against Macarthur FC, who have been in a form slump since parting in acrimonious fashion with former coach Dwight Yorke.

The Roar are just four points outside the top six and one behind Macarthur.

"Nothing is impossible. Impossible is just an opinion," Green said when asked about finals.

"People get carried away with league tables but the league table only matters when the last ball is kicked at the end of the season."

Green wants wins, aside from his ideals on style which includes "a little bit more aggression in the team".

"Everybody has got their ideals and philosophies in the game ... but the first thing for us is to try and accumulate points on the table," he said.

"It is week two, so it is really important we have clarity on messages and the guys understand what we are asking, and then we build from there."

Lofthouse was outstanding in the win over Perth Glory where his speed, vision and on-ball work was top shelf.

The 23-year-old has been given a dose of confidence by Green. He said he hadn't started in a game since Melbourne Victory away last year after being in-and-out of the team.

"Nick is bringing a real positive attitude," Lofthouse said.

"I'm grateful he has shown some belief in me."

Lofthouse plays in the same position as former Socceroo Robbie Kruse and has embraced his tutelage. He also has displayed Kruse's verve.

"I do like getting the ball and dribbling players, running in behind and just being positive," Lofthouse said.

"That is the main message we are getting now from Nick. It is all about bringing a positive attitude. It suits my style of play."