Central Coast Mariners captain Alex Wilkinson is remaining defiant despite the fact his side trails by two goals in their two-legged semi-final with league leaders Brisbane Roar.

The Mariners were unlucky not to at least score at Bluetongue Stadium on Saturday night, hitting the woodwork on three occasions, and Wilkinson says that the game style will certainly be opened up as they chase the tie at Suncorp this weekend.

With a double chance in case they lose, the Mariners will go all out in search of goals against the Roar and Wilkinson says a win is definitely an achievable goal.

''It's only halfway in the tie, so we've got 90 minutes to fix the result and score goals,'' he said. ''It's going to be pretty tough … But we're going to go there with the confidence that we did create chances against them and if we can score that first goal on Saturday we might put a few doubts in their minds.

"It's definitely not mission impossible.

''We're going to give it our all on Saturday, we're certainly not going to die wondering.''

Wilkinson is well aware of the talent and strength of the Roar, as he has seen it firsthand a number of times this term, but sent a reminder that the Mariners are without doubt a good side themselves.

''When a team comes along like Brisbane and goes 26 games unbeaten, they deserve all the credit they get,'' he added.

''But we've had a fantastic year, too. We finished with 57 points, we scored 50 goals and only lost five games in the regular season, which is fantastic. Any other year it probably would have been enough to win the comp but obviously Brisbane have had an extraordinary year.''