British boxer Anthony Joshua, left, trades blows with Ukrainian boxer Wladimir Klitschko during their fight for Joshua's IBF and the vacant WBA Super World and IBO heavyweight titles, at Wembley Stadium, in London, Saturday, Apr... . British boxer Anthony Joshua, left, takes a blow from Ukrainian boxer Wladimir Klitschko during their fight for Joshua's IBF and the vacant WBA Super World and IBO heavyweight titles, at Wembley Stadium, in London, Saturday, April 29, 201... .