FILE- In this file photo dated Saturday, April 29, 2017, British boxer Anthony Joshua celebrates after beating Ukrainian Wladimir Klitschko at Wembley stadium in London.  Big punching contenders Anthony Joshua and Joseph Parker will put their titles and reputations on the line it is announced Sunday Jan. 14, 2018, when they meet for a world heavyweight title clash in Cardiff on upcoming March 31. (AP Photo/Matt Dunham, FILE)
Anthony Joshua, the London 2012 Olympic super-heavyweight champion, unified the WBA and IBF titles with victory over Wladimir Klitschko. Matt Dunham / AP Photo

Boxing: Anthony Joshua and Joseph Parker set for world heavyweight title clash