After a relatively genial build-up to their blockbuster Wembley meeting, Wladimir Klitschko has turned up the heat ahead of his showdown with Watford’s Anthony Joshua.

The two heavyweights have spent the majority of their energy praising each other, with neither engaging in the usual pre-fight slanging match which goes hand-in-hand with box office bouts these days.

However, Klitschko, who saw his world titles slip away with defeat to Tyson Fury last year, looked to antagonise Joshua by producing a memory stick which, he claims, has a video of him predicting the result.

“I recorded a video last week, and the outcome of the fight,” the Ukranian said at today's pre-fight press conference.

“My predication, so to say. This (memory stick) is going to be in my robe which I’m going to wear this Saturday night, sealed.”

Klitschko’s claim is unlikely to unnerve Joshua and the 2012 Olympic champion arrives at what is undoubtedly the biggest fight of his career to date in confident mood.

A perfect record of 18 knockouts from 18 fights highlights the 27-year-old’s class but he is likely to be tested to a greater extent than in any of his previous outings.

Victory would see Joshua add the WBA belt vacated by Fury to his IBF title and he is taking nothing for granted against a fighter with proven pedigree.

“In training I don’t underestimate any opponent. I have got myself right,” the former Finchley ABC boxer explained.

“I’m looking forward to competing again. It’s just me and a man coming to blows. I’m still up early in the morning and very late at night.

“I’m prepared physically and mentally for any battle. I enjoy the sport and take it seriously.”

Klitschko’s 41 years mean landmark days such as Saturday are likely to be a far less common occurrence as he reaches the climax of a stunning career.

Joshua, meanwhile, arrives at the 90,000-seater sell-out looking to set himself apart as the division’s outstanding fighter.

For his challenger, age is just a number and Klitschko, who has lost only four times in 68 professional fights, is confident experience will having a telling say in events at the national stadium.

He said: “Can you imagine my next opponent, which is Anthony Joshua, I’m going to fight a guy whose age is exactly the number of how long I have been boxing. 27 years. Can you imagine that.

“Is it a degradation that I’m a challenger and an underdog in this fight? I don’t think so. I think it is a great opportunity.

“I feel young, hungry, humble and totally obsessed with my goal to raise my hands again as the winner of this fight.

“I’m so obsessed with that, I realised life is simple. I see myself in the gym, I do believe I know where he goes and what he is going to do.”

Joshua’s rise to prominence has been underpinned by a level-headedness and focus which remains intact.

With the chance of gaining global recognition beckoning, it would be easy to get caught up in the hype surrounding him.

Instead, Joshua is simply viewing the fight as the next stage in the development of what promises to be a superb career at the very top of the sport.

He explained: “April 29 is just another stepping stone towards greatness.”