Sky Blues captain Alex Brosque brushed aside suggestions the team need to immediately shift their attention away from Sunday's historic semi-final win over their oldest rivals, believing the euphoria could provide Sydney with a significant advantage for their grand final clash against Perth Glory.

Speaking after their Mother's Day mauling of Melbourne, Brosque was struggling to come to terms with a result he described as "surreal" as Sydney FC equalled their biggest winning margin over Victory.

He sees no reason why his team should be quick to forget this result, claiming the confidence will be crucial to drive the Sky Blues to what would be an upset against the premiers.

"We don't really want to come down from what we're feeling now," Brosque said.

"Even though we obviously didn't expect this result, we expected to have a couple of those results during the season but they just didn't come. I think we need to take as much confidence as we can because we know it's going to be difficult next week. We will definitely keep grounded. This group of boys won't get ahead of themselves by no means but we need to use what we did tonight to fuel us [against Perth]."

Unsurprisingly, the Sky Blues were brimming with confidence after putting six past Melbourne Victory and knowing they have already beaten Perth away from home this season. That result, coupled with Perth's jitters against Adelaide on Friday night, has Sydney licking their lips at the prospect of winning a fourth grand final.

"I think there is a lot we can take out of this weekend. We will look closely at the Adelaide game against Perth and see how well they did to come back a few times and really push Perth but I think that we just need to be confident in our own ability and what we can do," Brosque said.

"As dangerous as Perth are, as great as they have been all year, we don't really fear anybody and we have gone over there and beaten them. We were the first team to beat them over there. We know we can do it and it's just a matter of using what we did tonight, being as well prepared as we can throughout the week."

Brosque made his comeback from a heel injury on Sunday and emerged unscathed despite playing 90 minutes, about 30 more than he probably anticipated. He hadn't played for almost a month and required an injection before the semi-final to ensure his performance wasn't hampered by any discomfort. Speaking after the match, Sydney's captain says he will be ready to play against Perth on Sunday without any issues from his heel.

"It's good, it's OK. It held up quite well, I got an injection before the game just to numb it up and it feels good," Brosque said.