At 24, he was the outstanding male swimmer in the Olympic Games, with five gold medals in Tokyo. He won individual golds in the 50 and 100 metres freestyle and 100m butterfly - the first male swimmer to achieve this treble in the Olympics -  plus relay golds in the 4x100m freestyle and 4x100m medley. He broke his own world record in the 100m butterfly and was part of the world record breaking medley team. It took his career total to seven Olympic gold medals, having won two in Rio de Janeiro. He has also won 13 world championship gold medals. He currently holds three long course and six short course world records.