Image source, Getty Images

Cruiserweight world champion Lawrence Okolie aims to emulate David Haye, Oleksandr Usyk and Evander Holyfield by having future success as a heavyweight.

The Briton makes the first defence of his WBO belt on the undercard of Anthony Joshua's world heavyweight title bout against Usyk on Saturday.

But 28-year-old Londoner Okolie, who is 6ft 5in, expects to move up in weight categories later in his career. "I think it is destined, almost," Okolie told 5 Live's Boxing Podcast.

Okolie won his cruiserweight world title in March with a sixth-round knockout win over Poland's Krzysztof Glowacki at Wembley Arena and now fights unbeaten Montenegro fighter Dilan Prasovic, 26, at Tottenham Hotspur Stadium.

"Obviously I have to win on Saturday, but I've got people like Haye, Usyk and Holyfield in mind when I'm training," said Okolie.

"Size-wise, I'm taller than Usyk, and I don't enjoy the dieting but I have to do that to make the [cruiserweight] weight. But I look forward to putting on more size and strength."

Lawrence Okolie became WBO world cruiserweight champion earlier this year and makes the first defence of his belt against unbeaten Montenegro fighter Dilan Prasovic.

This is what the Briton had to say: "It's amazing to see all these press here and I want to shout out to my dad, who is here.

"It's all fun after I've got the stoppage victory with 67,000 people cheering, I will be looking forward to it. If you look at my past few fights, I get stoppages and I've been working on a lot of things.

"He is fast, strong, but no-one is going to come here and beat me in front of 67,000 people in my home town."

Coral Barry
BBC Sport combat sports editor in London

Ring announcers Michael Buffer and David Diamante chat by the stage as we wait on the arrival of Anthony Joshua and Oleksandr Usyk.

You know the big men are on their way when Buffer arrives.

Image source, BBC Sport

Campbell Hatton, the son of former two-weight world champion Ricky, has big shoes to fill but has won all three of his professional fights so far.

Next up is Sonni Martinez, from Uruguay, who has two wins and four losses to his name.

Here's the face-off.

Coral Barry
BBC Sport combat sports editor in London

Image source, Getty Images

Oleksandr Usyk first laid eyes on Anthony Joshua 10 years ago. It was 2011 and Usyk was in the crowd to watch Joshua compete at the World Championships in Azerbaijan.

Joshua was 21 and shocked everyone by reaching the final, where he was beaten by Mahammadrasul Majidov.

Usyk says he knew then Joshua would be an Olympic champion and the pair have been on a collision course ever since. They both turned pro in 2013 and both became unified champions of their respective divisions.

• Read more of our profile on Oleksandr Usyk here

We will be seeing Anthony Joshua and Oleksandr Usyk at 14:00 BST, but how much do you know about the Ukrainian?

Britain's Callum Smith had great success at super-middleweight, holding the WBA belt for more than two years before losing to Saul 'Canelo' Alvarez in Texas at the end of 2020.

Smith has now moved up to light-heavyweight and wants to replicate his triumphs. He said: "I feel good, am excited, good to be back. I've boxed in some very big occasions and this is another one and a pleasure to be a part of it.

"I've still got the same goals at this weight than what I had at 168 and I think I can do the same at this weight.

"It should be good, the stadium is unbelievable and I'm sure the atmosphere will be something special. A lot of people thought I would fight a knock-over job but this is a good test and I can't afford any slip-ups.

"Winning this will take me one step closer to a world title."

As mentioned, we've got live commentary on Saturday night of the Joshua-Usyk fight from 22:00 BST.

Before then, here's a clip from the 5 Live Boxing podcast, with Dillian Whyte's opinion on Usyk.

And Marku (white T-shirt) kept up the animosity when the two went head-to-head.

It's already got a bit heated - especially the pairing of Ukraine's Maxim Prodan and Albania's Florian Marku, who will be fighting with the IBF intercontinental welterweight title on the line.

As always you can have your say so tweet us using #bbcboxing to let us know your thoughts on the big Anthony Joshua v Oleksandr Usyk fight.

We're going to have more than 60,000 at Tottenham Hotspur Stadium on Saturday night and the preparations are well under way.

• Anthony Joshua (Great Britain) v Oleksandr Usyk (Ukraine) - WBA, WBO, IBF and IBO world heavyweight championships
• Lawrence Okolie (Great Britain) v Dilan Prasovic (Montenegro) - WBO world cruiserweight championship
• Callum Smith (Great Britain) v Lenin Castillo (Dominican Republic) 10x3 mins light-heavyweight contest
• Campbell Hatton (Great Britain) v Sonni Martinez (Uruguay) 6x3 mins lightweight contest.
• Maxim Prodan (Ukraine) v Florian Marku (Albania) 10x3 mins IBF international welterweight championship
• Christopher Ousley (USA) v Khasan Baysangurov (Ukraine) 10x3 mins WBA intercontinental middleweight championship

Coral Barry
BBC Sport combat sports editor in London

In position for the press conference at Tottenham Hotspur Stadium. First up we have the undercard fighters with the likes of Callum Smith and Lawrence Okolie speaking.

Then we have the main event with Anthony Joshua and Oleksandr Usyk set to face off for the first time.

Stay tuned!

Image source, BBC Sport

Thanks for joining us for the start of what promises to be a thrilling few days of action, building up to the main event of Anthony Joshua v Oleksandr Usyk on Saturday night.

We will have live radio commentary at 22:00 BST on Saturday of the main event, but before then, it's news conference time.

We only have two days to wait until world heavyweight champion Anthony Joshua is next in action, when he takes on dangerous Ukrainian Oleksandr Usyk - the former undisputed cruiserweight champion.

We've got the news conferences today so it could be a feisty afternoon.