Australian superstar Ariarne Titmus defeats US legend Katie Ledecky to win gold in the women's 400m freestyle at the Tokyo 2020 Olympics.

Titmus, famous for beating US swim star Katie Ledecky at the Paris Games, was expected to compete in the 2028 Olympics.

Titmus first Australian since Dawn Fraser in 1964 to win back-to-back gold medals in the same event

Australian swimming star Ariarne Titmus, a four-time Olympic gold medallist, has announced her immediate retirement from competitive swimming at age...

Australian swimming star Ariarne Titmus, a four-time Olympic gold medallist, has announced her immediate retirement from competitive swimming at age...

Australian swimming legend Ariarne Titmus, a four-time Olympic gold medallist, announces her retirement at just 25.

Australian swimming legend Ariarne Titmus, a four-time Olympic gold medallist, announces her retirement at just 25.

Australian swimming legend Ariarne Titmus, a four-time Olympic gold medallist, announces her retirement at just 25.

While some Australians have won more Olympic medals competing in more Games, Ariarne Titmus will go down as an alltime great for her 400m freestyle...

While some Australians have won more Olympic medals competing in more Games, Ariarne Titmus will go down as an alltime great for her 400m freestyle...