Katie Ledecky of the United States destroyed the field in the 800 meters freestyle on Friday and broke the world record to complete a rare Olympic swimming treble.
It is safe to say Michael Phelps has no need for a lifeguard watching over him in the Olympic pool but the most decorated Olympian of all time, with 18 gold medals among his career haul of 22, will have one anyway at the Rio Games.
Michael Phelps won the 19th gold medal of his Olympic swimming career on Sunday after helping the US men's team to victory in the 4x100 metres freestyle relay.
Drysdale wins close single sculls gold Also, check out late gold medal winners from Day 7...