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Promoter Eddie Hearn says he is "nervous" about Anthony Joshua 's showdown with Alexander Povetkin at Wembley on Saturday.
Joshua, the WBA, WBO and IBF world heavyweight champion, faces 39-year-old Russian Povetkin, who has only been beaten once in his 35-fight career - by Wladimir Klitschko in 2013.
"It's a massive show, a massive event with the biggest star in world boxing and the best heavyweight in the world," Hearn said.
The 20 best Anthony Joshua picturesShow all 21 1 /21The 20 best Anthony Joshua pictures The 20 best Anthony Joshua pictures The 20 best Anthony Joshua pictures Anthony Joshua fights Joseph Parker on March 31, so we thought now was a good time to look back at some of the heavyweight champion's greatest pictures.
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The 20 best Anthony Joshua pictures That uppercut Defeating Wladimir Klitschko on April 29 2017.
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The 20 best Anthony Joshua pictures Champion Celebrating after victory over Charles Martin on April 9 2016.
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The 20 best Anthony Joshua pictures Walking tall At the Burj Al Ara in Dubai, in November 2017.
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The 20 best Anthony Joshua pictures Unification With Joseph Parker, at the Joshua vs Parker press conference on January 16 2018.
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The 20 best Anthony Joshua pictures The future With Luke Campbell, Tom Stalker, Fred Evans and Andrew Selby of Team GB ahead of the London 2012 Olympic Games on December 2, 2011.
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The 20 best Anthony Joshua pictures Turning up the heat Ahead of the Klitschko fight.
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The 20 best Anthony Joshua pictures Relaxing Taking a bread during a media workout in Sheffield, on April 19 2017.
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The 20 best Anthony Joshua pictures The hype train Talking to the boxing press, on February 19 2016.
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The 20 best Anthony Joshua pictures To the victor, the spoils With Klitschko, after taking his belts.
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The 20 best Anthony Joshua pictures A rare defeat At the BBC's Sports Personality of The Year awards, on December 17 2017.
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The 20 best Anthony Joshua pictures In for the kill Stopping Carlos Takam, on October 28, 2017.
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The 20 best Anthony Joshua pictures The establishment Holding his MBE medal, on February 20, 2013.
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The 20 best Anthony Joshua pictures First belt After defeating Denis Bakhtov to win the WBC International Heavyweight Championship, on October 11, 2014.
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The 20 best Anthony Joshua pictures Dancing Dominic Breazeale stumbles. June 25, 2016.
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The 20 best Anthony Joshua pictures Victory Wladimir Klitschko is beaten.
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The 20 best Anthony Joshua pictures Gold On the podium at the London 2012 Olympics.
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The 20 best Anthony Joshua pictures Getting personal Throwing a punch at Dillian Whyte, on December 12, 2015.
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The 20 best Anthony Joshua pictures Sit down Knocking out Raphael Zumbano Love, on May 9, 2015.
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The 20 best Anthony Joshua pictures Game recognises game Meeting the legendary Michael Watson. November 14, 2013.
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The 20 best Anthony Joshua pictures Fresh faced After victory over Roberto Cammarelle in the Men's Super Heavy (+91kg) Boxing at London 2012.
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"But I'm a bit nervous because I think this is a much tougher fight than people give it credit for. Boxing fans know how big a fight this is and how tough a fight this is.
"Outside of Klitschko I think on paper this is the toughest fight of Joshua's career so far.
"He's expected to win. But Povetkin punches very hard, he's got a good chin, he's durable. I expect this to be a real test."
PA
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