Usyk v Fury: Ringwalk time, undercard and how to follow undisputed heavyweight fight

Briton Tyson Fury will fight Ukraine's Oleksandr Usyk on 18 May in Riyadh, Saudi Arabia.

It is the first undisputed heavyweight title fight since 1999 and the first time all four major world titles have been on the line in the four-belt era.

Live text commentary on the BBC Sport website and app will start at 19:00 BST.

Build-up will be available throughout fight week, including daily podcasts from the BBC Radio 5 Live Boxing team with Steve Bunce.

The Usyk-Fury ringwalk is not expected before 23:00 BST, with broadcasters expecting a 23:05 start time.

TV coverage starts at 17:00, with Joe Cordina's world title fight with Anthony Cacace expected after 20:00.

Anthony Joshua emerged for his ringwalk at 00:24 UK time when he fought Francis Ngannou in Riyadh in March, and organisers are aiming for an earlier start for Usyk-Fury.

For the first time in the modern era all four heavyweight belts will be on the line - WBO, WBA, IBF and WBC.

The Ring magazine heavyweight title is also up for grabs.

Usyk is the current owner of the title, which is traditionally awarded to the best fighter in a division.

The referee will be American veteran Mark Nelson, who has 990 bouts under his belt so far.

The three judges at ringside are Spain's Manuel Oliver Palermo, Canada’s Craig Metcalfe and American Mike Fitzgerald.

Fury will be wearing green and gold shorts, while Usyk will be in blue and yellow.

As well as the officials, the fighter's teams may play a big part, especially Fury's cut-man.

Frank Hopkins will be overseeing Fury's right eye, which was split open in February while sparring. Sugar Hill Steward is the head trainer, while Fury's corner will also include his father John.

Usyk's head trainer is Yuri Tkachenko, assisted by Sergiy Lapin, and the cut-man is Russ Anber.

Fury and Usyk are undefeated, with the only slight blemish on Fury's record a draw with Deontay Wilder in 2018.

Fury, 35, has 34 wins and has produced four stoppages in his past five fights. He has 24 stoppages in his career.

He has held every world title in the heavyweight division - he beat Wladimir Klitschko in 2015 to become unified champion - but has not held all four belts at the same time.

Usyk, 37, is unbeaten in 21 fights with 14 stoppages. He has had only five fights at heavyweight, beating Anthony Joshua in 2021 to become unified champion in his third bout in the division.

He was undisputed champion at cruiserweight and was an Olympic, European and world champion at amateur level.

While their records are evenly matched, Fury is 6ft 9in compared to the 6ft 3in Usyk and has a seven-inch reach advantage.