Ben Davison is considered one of the best boxing coaches in the world.
He rose to fame after coaching Tyson Fury back from 28st and inactive to the tormentor of Deontay Wilder.
And now he's getting Anthony Joshua ready for the Day of Reckoning, where he takes on Otto Wallin in the main event.
In this exclusive interview with Sun Sport, Davison tells us what fight camp with AJ has been like and his prediction for the fight.
The bout, which is being held in Riyadh, Saudi Arabia, will feature an undercard topped by Deontay Wilder vs Joseph Parker.
The card also features a huge grudge match between Daniel Dubois and Jarrell Miller.
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