Premier's Plate winners Brisbane Roar will head into Saturday night's semi-final second leg with Central Coast Mariners with the same mindset and attitude as they have all season.

They are the sentiments of coach Ange Postecoglou who says that the Roar will not try to protect their 2-0 lead over the Mariners when the sides meet at Suncorp Stadium following Saturday's first leg.

"From my point of view it would be a mistake to do anything different," Postecoglou said. "We'll be looking to keep improving but I wouldn't change too much."

Postecoglou has the luxury of bringing the likes of Jean Carlos Solorzano and Massimo Murdocca off the bench and he says these types of players could prove to be handy as the finals series gets tougher.

"Our bench has been a big part of what we've tried to do this season," he added.

"We like to play a high-tempo game so it's important that the guys who come on can inject that.

"Central Coast would have been looking for a respite the other night and we were able to keep going hard at them."

The second leg will be played in Brisbane on Saturday night - kick-off is at 7:00pm local time (8:00pm AEDT).