Klitschko, a 41-year-old who tasted defeat for the first time in a decade when going down to Tyson Fury in November 2015, is hoping to reclaim the WBA and IBF world heavyweight titles he lost that night in Dusseldorf.

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For Joshua, this represents an chance to score a victory over an established, respected fighter that few of his sceptics will be able to dispute.

When is it?

The fight will take place TONIGHT at Wembley in London.

What time will it start?

Joshua and Klitschko are expected to enter the ring at approximately 10pm.

Where can I watch it?

The main event and the undercard will be shown live on Sky Sports Box Office.

Can I still buy tickets for the event?

Not through Matchroom, the event’s co-promoters.

All tickets, including the extra 10,000 made available after London Mayor Sadiq Khan agreed to increase Wembley’s capacity, are now sold out.

Who’s on the undercard?

Scott Quigg vs Viorel Simion WBA international featherweight title Luke Campbell vs Darleys Perez Katie Taylor vs TBC Lawrence Okolie vs Russ Henshaw Joe Cordina vs TBC Josh Kelly vs TBC

What are their records?

Wins, wins by knockout, losses, draws

Joshua: W18 KO18 L0 D0 Klitschko: W64 KO53 L4 D0

What’s on the line?

Joshua is the reigning IBF world heavyweight title holder, a belt that Klitschko lost in defeat to Tyson Fury in November 2015.

Fury was subsequently stripped of the belt after failing to fight mandatory challenger Vyacheslav Glazkov. Charles Martin, who beat Glazkov, then lost his first defence of the belt to Joshua.

The WBA (Super) and vacant IBO world heavyweight titles, both previously held by Fury, will also be on the line.

What are the odds?

Odds provided by 888.com

Joshua: 11/25

Klitschko: 7/4

Joshua decision: 8/11

Joshua by KO: 11/2

Klitschko decision: 3/1

Klitschko by KO: 11/2