Michael Phelps is hands down the best swimmer the world has ever seen. The greatest ever Olympian took his gold medal tally to 23 in Rio de Janeiro, meaning he now has 28 medals in total and has truly cemented his legacy as an all-time legend.
However, he wasn't always the best. Years of hard work and dedication have taken him to the top, but once upon a time, he was just a young kid trying to catch up with the best. And 'the best' was the Atlanta Hawks' big man Kris Humphries.
Back in his formative years, at the tender age of 10, Humphries out-swam not just Phelps, but the USA's 12-time Olympic medalist Ryan Lochte.
The Minnesota native was faster than the two Olympians, and dominated in the 50-metre freestyle, 100-metre freestyle, 50-metre butterfly, 50-metre backstroke, 50-metre breaststroke and 200-metre individual medley. The medley is an event Phelps has won at the Olympics on four separate occasions.
The now-31-year-old clocked up three records for his age bracket in the 50m and 100m freestyle - they lasted in the U.S. Swimming's youth record books for over 18 years.
However, having enjoyed so much success in the pool at a young age, he opted for a career in basketball having been wowed by the powers of Michael Jordan, a man who Phelps said inspired him to achieve swimming greatness.
Humphries isn't the only player who enjoyed success in the pool. Tim Duncan's career followed a similar path as he dominated his age group before sacrificing his time in the water for a career on the hardwood.