Anthony Joshua is set for a career-defining fight this weekend when he takes on former multiple-time heavyweight champion Wladimir Klitschko in front of 90,000 people at Wembley.

For the IBF heavyweight champion, this is his chance to prove just how good he is after coming under heavy criticism for the calibre of opponents he has faced thus far.

That won't be the case this weekend. AJ has the chance to secure the WBA (Super) and IBO heavyweight titles that Tyson Fury vacated after beating Klitschko at the back end of 2015, but standing in his way is a Ukranian with revenge on his mind.

"He has to pass on the baton. I do hear it a lot, he's too old, he's faded. But then I try and flip it. Even if he is too old, which I think he is, he's in a good place mentally and that's a dangerous fighter. Timing is everything and maybe Father Time has caught up with the former champ," Joshua told BBC Radio.

Fans were disappointed with Joshua's and Klitschko's performances on Sky Sports' 'The Gloves are off' and while it is refreshing to some that both fighters can be respectful and refrain from trash-talking, many others felt it was forced.

AJ is now showing some of the fire he will need to take the 40-year-old Klitschko down on Saturday and he insists he's going to beat him like an amateur.

"I am a completely different person now. I'm at a place now where he's obsessed with beating me and I'm confident," Joshua said.

"I'm not a gym fighter. If I'm depending on his age and he's depending on the sparring from years ago then he will definitely get it wrong. He's got to come across a young lion who studies the game.

"Whatever type of fight he wants to fight, if it goes down the route of us two swinging until the cows come home, I don't think I will back out. My obligation first and foremost is to make him look like a novice."