Western United coach Mark Rudan has sparked a war of words with Brisbane Roar counterpart Robbie Fowler following his team's 2-0 A-League win at Suncorp Stadium.

Rudan said he was disappointed the Liverpool legend and his other coaching staff did not shake his hand following Friday's win, which came courtesy of first-half goals by Connor Pain and Besart Berisha.

Despite dominating possession and territory the Roar could only manage one shot on target.

Rudan then had a confrontation with Roar chief executive David Pourre on the pitch after the game, feeling he had been disrespected by Fowler and his staff.

"I went over to shake hands with the opposition coach or coaches and they weren't around," Rudan said.

"I asked the CEO post-game and he quite surprisingly had a crack as well. I think David's a good guy but for him to come out and swear the way he did ... I know he's under pressure. I know Robbie Fowler's under pressure but I've lost games too ... you go and still respect the opposition coach.

"I know it's a pressure situation and you want to do well but at the same time I was very, very disappointed."

Fowler's frustration had been evident earlier when he declined an on-air interview with Fox Sports at the start of the second-half.

The Roar coach had watched his team go in at the break two-goals down despite being camped for large parts of the opening period in United's half.

Pain opened the scoring in the 11th minute when he slid home a cross from Italian marquee Alessandro Diamanti at the back post.

Former Brisbane hero Berisha missed a header minutes later from inside the six-yard box but made up for that a minute into first half injury time when he clinically finished Aaron Calver's centre to silence the Den who used to cheer his name.

The closest the Roar came was when Stefan Mauk's 40th minute strike was deflected on to the post by veteran defender Andrew Durante.

Fowler, who was unimpressed by Rudan's team using gamesmanship and time-wasting tactics, didn't see a reason to wait for the United coach to finish celebrations with his players to shake hands.

"Well he's probably disappointed because I weren't there, yeah," Fowler said.

"I've got no problems with anyone. Will I shake his hand? Of course if he's there, but him and his team are off celebrating so I'm not going to wait around for him.

"Look, if he's offended by that, then I apologise."

Roar boss Pourre claimed it was Rudan's behaviour that was unacceptable and believed he had set a poor example for his A-League expansion club.

"Mark Rudan made a beeline to approach me, instigate his foul language around our coaching staff, that he felt they didn't show him respect by not shaking their hands," Pourre said.

"As leader of the club I have a responsibility to protect our members, our fans, our players and in particular our coaches as well from any threat or abuse.

"I felt that Mark certainly stepped over the line addressing that in that manner."

Brisbane have a bye next week while United take on Western Sydney next Friday at Bankwest Stadium.