Britain’s former world heavyweight and cruiserweight champion David Haye announced his retirement on Tuesday following two successive defeats by fellow Englishman Tony Bellew.
Heavyweight is the heaviest class of boxing and has no weight limit in all four main boxing organisations: WBO, WBC, WBA and IBF. As of July 2018, The Ring magazine ranked the best five heavyweight boxers as: 1. Anthony Joshua (UK); 2. Deontay Wilder (USA); 3. Alexander Povetkin (Russia); 4. Joseph Parker (New Zealand); 5. Luis Ortiz (Cuba)