Expert predictions - Richie Woodhallpublished at 21:26 British Summer Time 29 April 2017
BBC Radio 5 live
Former world super-middleweight champion Richie Woodhall: "Klitschko controls the fight better when people are going to him. He's a master at adjusting his feet and keeping a gap, an absolute master.
"I think the victory for Joshua will come by boxing at a distance and making Klitschko come forward.
"I see Joshua winning the fight in the mid to late rounds, around the seventh or eighth. I think Joshua will stop him eventually and catch him with a solid shot.
"At 41, you have to ask how long Klitschko can go on at this level. It will take a hell of a performance to beat Joshua, who I don't think will come out swinging, but will box intelligently. If he goes wading in, he could walk in to a trap."
Did you know? Joshua has spent less than two hours in the ring as a professional on his way to 18 knockout wins in 18 fights.