Chad le Clos' Olympic career has been 'unbelievable' thus far.
He is South Africa's most decorated Olympian and the 29-year-old's job is not done as he appears in his third Olympics in Tokyo.
At the London 2012 Games, Le Clos produced one of the biggest Olympic upsets when he defeated American great Michael Phelps in the 200m butterfly.
Le Clos then took silver in men's 200m freestyle, touching the wall 0.55 seconds behind Sun Yang, who has since been banned for doping.
At the 2016 Rio Olympics, Le Clos took two silver medals in the 200m freestyle and 100m butterfly.
It wasn't the performance that Le Clos wanted, but it saw him win his fourth Olympic medal - the most by any South African since the country first contested an Olympic Games back in 1904.
In the build-up to Japan, Le Clos has been training with three-time Olympic gold medallist Katinka Hosszu of Hungary.
He also took gold and silver at the Mare Nostrum Series Open in Barcelona last month. At the Budapest Open Championships, also last month, Le Clos clocked his fastest time of the season (52.01) in the 100m freestyle.
Looking ahead to the Tokyo Olympics, Le Clos is one of the few South African athletes in with a strong shout for a medal, perhaps even another gold.
Le Clos looks to potentially compete in four swimming events: 100m and 200m freestyle, 100m and 200m butterfly.
He'll have some major competition as he looks to fend off world record holder Kristof Milak of Hungary in the 200m butterfly and American world record holder Caeleb Dressel in the 100m 'fly.
Le Clos gets his Olympic campaign under way on Sunday in the men's 200m freestyle heats at Tokyo Aquatics Centre.