Michael Phelps
Alexander Popov
Stat by stat
Bars are scaled to the leader in this list.
The verdict
Michael Phelps leads 4 of 4 categories. Our all-time ranking places Michael Phelps at #1 and Alexander Popov at #7.
The case for Michael Phelps
The most decorated Olympian in history across all sports. Phelps won 28 Olympic medals, 23 of them gold, over five Games from Sydney 2000 to Rio 2016, including a still-unmatched eight golds at Beijing 2008 that broke Mark Spitz's 1972 record of seven. He set 39 world records and claimed 26 world-championship titles. His range was staggering: Olympic gold in the 100m and 200m butterfly, the 200m and 400m individual medley, the 200m freestyle and a stack of relays. Coached by Bob Bowman, Phelps combined a huge wingspan, relentless training volume and famous racing nerve, touching out Milorad Cavic by 0.01 seconds in Beijing. No swimmer has matched his blend of longevity, versatility and championship hardware, and none is close on career gold medals.
The case for Alexander Popov
The 'Russian Rocket', the greatest pure sprint freestyler of the 1990s and a technician of legendary smoothness. Popov won the 50m and 100m freestyle at back-to-back Olympics, Barcelona 1992 and Atlanta 1996, four individual golds and nine Olympic medals in total, along with around six world-championship titles across a long career. Remarkably, he was stabbed in a Moscow street incident in 1996 yet returned to competition and set a 50m freestyle world record of 21.64 in 2000. Coached by Gennadi Touretski, Popov swam with a famously long, relaxed stroke that let him dominate the sprints for a decade, and he remained competitive into his early thirties, an unusual feat for a sprinter, winning world titles in 2003.