Tyson Fury vs Oleksandr Usyk: Start time, undercard, and how to ...

Tyson Fury and Oleksandr Usyk will meet on Saturday for a fight that will crown the first undisputed heavyweight champion since 1999.

The unbeaten rivals will face each other for the first time at the Kingdom Arena in Riyadh, Saudi Arabia.

British boxer Fury is the current WBC heavyweight champion of the world.

Ukrainian Usyk remains undefeated in his professional career and has yet to be beaten since switching from cruiserweight where he was the undisputed champion.

The pair were supposed to face each other in February but Fury got a "freak" sparring injury that forced him to postpone the fight.

A week of pre-fight events got off to an explosive start when Fury's dad John Fury headbutted a member of Usyk's entourage at a media event on Monday.

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When is the fight?

The ring walks for the main event are expected at 11pm UK time on Saturday 18 May.

Coverage of the build-up begins at 4pm UK time on Sky Sports Box Office with two hours of the undercard on Sky Sports Action from 4pm.

Who's on the undercard?

Joe Cordina will defend his super-featherweight world title as he fights Anthony Cacace on the undercard.

Jai Opetaia will face Mairis Briedis for the vacant IBF cruiserweight title.

Here are the other fights expected on the undercard:

Mark Chamberlain vs Joshua Oluwaseun Wahab

Sergey Kovalev vs Robin Sirwan Safar

Isaac Lowe vs Hasibullah Ahmadi

David Nyika vs Michael Seitz

Moses Itauma vs Ilja Mezencev

Agit Kabayel vs Frank Sanchez

What have Fury and Usyk said?

Fury said he respects Usyk's achievements - but he's out to prove himself as the best in the world.

"I'm the best. I'm just defending my 'best-ness' against him," he said.

"We have weight divisions for a reason. When the cruiserweights step up to the big boys, usually they get found wanting.

"You can beat the average big ones, but you can't beat the elite big ones because size really matters. These are facts."

Meanwhile Usyk insisted he wouldn't be paying attention to Fury's mind games.

"I'm doing good, I'm happy and I'm hungry. I don't care how Tyson will be this week. I'm ready," he said.

"For me May 18 is important, what Tyson does in the press conferences doesn't matter.

"I don't think about Tyson Fury now. I've seen him in a lot of fights. I don't know how he will box against me, we will see when we get into the ring."

Usyk's promoter Alexander Krassyuk said the boxer's weapon was no secret: "His weapon is his mind, his heart, his experience and boxing skills.

"And the main thing about him that is different from Tyson Fury is his discipline. That is what makes him great and it is his toughest weapon."

What are their professional boxing stats?

Tyson Fury:

• Age: 35• Height: 6ft 9in• Total fights: 35• Record: 34-0-1 (0 KOs)

Oleksandr Usyk:

• Age: 37• Height: 6ft 3in• Total fights: 21• Record: 21-0 (14 KOs)

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Where can I watch the coverage?

The event will be shown live on Sky Sports Box Office (Sky channel 491) and Sky Sports Box Office HD (Sky channel 492).

The event is £24.95 for Sky customers in the UK and €27.95 for Sky (and Virgin Media) customers in the Republic of Ireland.

It can be booked via the Sky Sports Box Office destination on Sky Q or through the home button on your Sky remote for Sky Glass and Sky Stream customers.

Sky+ customers can book via the Box Office button on your remote

Sky Q and Sky+ customers can also book online.

Bookings can also be made over the phone by calling 03442 410888 (0818 220 225 from ROI).

There will be a £5/€5 surcharge for bookings made over the phone from midnight Friday 17 May to midnight Saturday 18 May.