Heavyweight contender Robert Helenius is gearing up for the biggest fight of his career.

On October 15th at the Barclays Center in Brooklyn, Helenius will face former WBC heavyweight champion Deontay Wilder in the main event of a Fox Sports Pay-Per-View card.

Wilder returns for the first time since suffering back to back stoppage losses at the hands of current WBC champ Tyson Fury.

"I'm a different fighter from Fury so he [Wilder] is going to prepare differently," Helenius told Sky Sports. "He made a good fight the last fight against Fury. Of course they were really tough fights but I think he improved every fight.

"I see him as a completely new fighter and I know that people can change between fights. I don't think that [coming off a loss] is going to be a big problem, he has a lot of experience. I think it's going to be a really, really good fight."

Helenius is returning from the best moment of his career, after picking up back to back stoppage wins over Adam Kownacki, who was being groomed to face Wilder.

Wilder is a big favorite to win - and Helenius expects a very tough contest, which he's hoping will lead to a world title shot.

"It's the next step. I have to prove myself in this fight as well so that I can get the world championship fight. It's not going to be easy. That's why we have been doing work all year. We knew we have to do everything, put everything on the line," Helenius said.

"I feel I'm ready for this fight. I'm going to do everything in my power. I have been waiting for a world championship for a long time."