Stepping out of Ange Postecoglou's shadow was always going to be hard for the Brisbane Roar.

But they put their best foot forward with a record 5-0 second-round win over Postecoglou's Melbourne Victory at Suncorp Stadium on Saturday night.

There was no love lost ahead of the long-awaited clash between Postecoglou and the team that he guided to back-to-back A-League championships.

Especially after he'd taken exception to the Roar's very public desire to send home their former mentor a loser.

And Brisbane danger man Thomas Broich's claim that former assistant and now Roar coach Rado Vidosic was the "brains" of their past championships rather than Postecoglou didn't go down well either.

However, even Postecoglou could not have argued with the result on Saturday night as the Victory suffered a 5-0 loss for the first time in the glamour club's history as the Roar looked to make a point in front of 17,364 fans.

Brisbane brought the crowd to their feet when they opened the scoring when German maestro Broich capitalised on a clever Massimo Murdocca throw-in in the 22nd minute to find the back of the net.

And within a minute big Erik Paartalu made it 2-0 when his header sealed a Broich corner.

The Victory were on the back foot in the second half when Besart Berisha finished off an end of the field effort sparked by a clever clearing kick by Roar keeper Michael Theo in the 64th minute.

The crowd was brought to their feet in the 82nd minute when Mitch Nichols fed off Ivan Franjic.

And the Roar sealed the record win over the Victory when Albanian international Berisha found the back of the net in stoppage time.

The Victory were always going to be vulnerable on Saturday without the likes of key players Archie Thompson, Mark Milligan (Socceroos) and Marco Rojas (All Whites) due to international duty.

Especially after their 2-1 last round loss to arch rivals Heart.

But it seems nothing prepared Postecoglou's side for the onslaught ahead at Suncorp Stadium on Saturday night.

"I knew it was a challenge coming up here," Postecoglou said.

"But we are trying to play a style of game. It is going to take some time to come to grips with it, the players are still in a learning process - the players will get there."

Postecoglou cut short reporters when they tried to bring up his Roar background.

"It's not my team. It never has been. To me it's just another game," he said when his former side was inevitably brought up.

"I am coaching the Victory club. My responsibility lies solely with getting this club back to where it belongs and start performing like our supporters think they deserve - that's our focus.

"I have spoken about the Roar. I don't care any more. They had their choice about the way they approached the week - it's a free world.

"They are a great side and congratulations to them. This club has nothing to do with me any more."