Anthony Joshua and Wladimir Klitschko fight to establish themselves as the world's leading heavyweight at Wembley Stadium on Saturday night.
IBF champion Joshua also hopes to win the WBA title last held by Tyson Fury, while Klitschko attempts to become a world champion for the third time.
Joshua tipped the scales at a career-heaviest, while Klitschko was his lightest since 2009. Here, Press Association Sport compares the two fighters.
Joshua Klitschko
27 Age 41
18 Fights 68
18 Wins 64
18 KOs 53
0 Draws 0
0 Losses 4
44 Rounds boxed 358
6ft 6ins Height 6ft 6ins
Orthodox Stance Orthodox
82in / 208cm Reach 81in / 206cm
17st 12lbs 10oz Weight 17st 2lb 6oz
Source: PA