David Deron Haye (born 13 October 1980) is a British professional boxer from England. Haye is the former WBA heavyweight champion. He is also the former unified world cruiserweight champion, holding the WBA, WBC, WBO, and The Ring cruiserweight titles, and the former European cruiserweight champion. Haye challenged Jean-Marc Mormeck on 10 November 2007 for the WBA, WBC, & The Ring cruiserweight titles. Haye defeated Mormeck by knockout in the seventh round, despite Haye needing to rally after being knocked down by Mormeck in the fourth. The victory confirmed Haye's arrival as a genuine world class fighter. Wladimir Klitschko versus David Haye was a heavyweight unification fight for the WBA, IBF, WBO and The Ring heavyweight titles, the fight taking place at the Imtech Arena, Hamburg, Germany on 2 July 2011. Klitschko defeated Haye by a unanimous decision. He is presently in negotiations for a possible bout with WBC heavyweight title holder Vitali Klitschko, the older brother of Wladimir.