Lawrence Okolie hopes to challenge for a world title in the future

Lawrence Okolie has set himself a world title target, so we asked him to assess five of the best cruiserweights who could stand in the way of his ambitions.

The unbeaten 25-year-old plans to become a world champion by 2020 and will take another step up in class against British champion Matty Askin on the Anthony Joshua-Alexander Povetkin bill at Wembley on September 22, live on Sky Sports Box Office.

Okolie analyses a crop of potential future opponents, including cruiserweight king Oleksandr Usyk, who is discussing a clash with Tony Bellew.

Oleksandr Usyk

Oleksandr Usyk unified all the world titles in the World Super Series final

He's got all the belts. He's beaten some good fighters on his way there, so definitely he's top of the tree.

He's got good physical and mental conditioning. That's his main things. He's definitely got skills - a lot of people have skills, but as you get tired it starts to waver. He's very good at keeping his composure the whole way.

Murat Gassiev

Murat Gassiev lost his two world titles to Usyk in a points loss

You can't take away the fact that he can punch hard. I think he will learn from losing to Usyk, closing down the ring, etc, etc.

He's a good fighter, but I think he will struggle against people who are physically fit and can outbox him.

Mairis Briedis

Mairis Briedis previously held the WBC title

He's a good fighter, a good technician, got a good heart.

We'll see how I get on with Askin but, with someone like him, because I'm so much taller and bigger than he would be, it would be good for me.

Yunier Dorticos

Yunier Dorticos was stopped in the final round by Gassiev

An orthodox Cuban, confident style.

He's shown himself to be quite flat-footed, wanting to have a fight too much, because he believes in his power. It makes him a little bit vulnerable himself.

Andrew Tabiti

Andrew Tabiti has been guided by Floyd Mayweather's promotional company

He hasn't had a major step-up fight. I think he just needs a breakthrough fight so everyone can see how good, or how not good he is.

He's fit, fast, seems to have good power. I don't know him well, but I know who he is, so that's a fight that could happen definitely.

Stylistically, I think Andrew Tabiti and then Briedis would probably be the best ones.

Can Bellew beat Usyk?

Tony Bellew has called for a fight with Usyk