Ange Postecoglou delivered a passionate response to a question about his future in his ahead of the against Manchester United.

take on the Red Devils in San Mames, Bilbao on Wednesday night, aiming to claim their first piece of silverware for 17 years and their first European trophy in 41 years.

Both teams have been poor in the Premier League, but excellent in Europe to reach this stage, with 's future as the Lilywhites' head coach hanging by a thread in recent weeks.

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are likely to finish 17th in the English top flight and record their worst ever Premier League campaign. But could, conversely end the season with a trophy.

There are plenty of rumours circling about the Australian's future, with many reports suggesting that, no matter what happens n San Mames, Postecoglou could depart the club.

But if he does, it will not, seemingly, be of his own accord.

Postecoglou initially admitted that leaving after a success was "more common than you think" when looking at his past.

He said: "I qualified for a World Cup and left, I won a treble with Celtic and left, won at Brisbane and left, it's actually more common than you think."

But when pressed by another journalist on his future, Postecoglou roared into life.

"My future is assured, mate, I wouldn't be the first person who changes jobs, we all change jobs," he said.

"My future is assured, I've got a beautiful family, a great life, I'll keep winning trophies until I finish, wherever that is, don't worry about my future, my future is not entwined with anything, my future is assured."

When pressed on if he could leave by resigning, however, Postecoglou was adamant.

"No, because I don't think my job is done here," he admitted. "I really feel like we're building something and what a trophy does is hopefully accelerates that.

"I still think there's a lot of work to be done. The challenges we've had this year are well chronicled, but there's been some reasoning in that and there's also been growth I'd like to see through, but whether that happens or not is not that important right now.

"I think this job is far from finished. There's some growth there to take this club where it needs to be."