'You don't understand': Deontay Wilder breaks down in speech on dangers of boxing – video

Former heavyweight champion Deontay Wilder broke into tears as he spoke about the dangers of boxing and its effects on fighters such as Puerto Rican boxer Prichard Colon, who was left in a vegetative state after a fight in 2015. "You don't understand what we go through, man." he said. Wilder was speaking after defeating Finnish opponent Robert Helenius with a trademark knockout blow in the first round.

• Deontay Wilder blasts out Helenius in first to roar back into title picture