Michael Phelps won the 17th Olympic gold medal of his career, and his 21st overall, when he produced a majestic performance in the 100m butterfly.

Rebecca Adlington claimed her second bronze medal of the London Olympics as 15-year-old Katie Ledecky produced the second fastest 800 metres freestyle in history to take gold for the United States.

Nathan Adrian destroyed Australian star James Magnussen’s ambition of adding the Olympic title to his world crown when the American out-touched him by one 100th of a second in the 100 metres freestyle.