These two heavyweight superstars fight on Saturday night for the IBF title and the vacant WBA belt in front of 90,000 fans at Wembley Stadium.
Despite this being his toughest test to date, the unbeaten Joshua is the strong favourite with the bookies. Don't miss William Hill's enhanced evens price for all customers, it's available for a limited time only.
On the other hand, Klitschko should not be under estimated. His record boasts 68 professional fights, a 78% stoppage rate and just four losses. He has held three recognised versions of the heavyweight belts, the WBA, WBO and IBF.
All the indications are that this one will end early and William Hill are offering you the best price on round betting compared to selected bookmakers.
If you haven't already got a William Hill account you can sign up now and deposit £10 and get £30 in free bets.
Enjoy the fight.