America’s Michael Phelps led from start to finish to claim the men’s 200m individual medley, becoming the first male swimmer to win the same event at three successive Olympics.
The 27-year-old clocked 1 minute, 54.27 seconds, just off his winning time in Beijing but nearly two-thirds ahead of fellow countryman Ryan Lochte, with Hungary’s Laszlo Cseh completing the podium.
Elsewhere, Great Britain beat France in world record time to retain their men’s Olympic track cycling team sprint title, giving Chris Hoy his fifth Games gold medal.
Jason Kenny, Philip Hindes and Hoy completed their three-lap effort in a new world mark of 42.600sec to slash 0.147 off the record they had set earlier in qualifying.
British Duo Tim Baillie and Etienne Stott produced a superb display to win Olympic C2 canoe slalom gold for Great Britain ahead of countrymen David Florence and Richard Hounslow.
The slowest of the six qualifiers from the semi-final, Baillie and Stott proved too strong for their opponents, eventually crossing the finish line in an impressive time of 106.41 seconds, a marker which would never be beaten.
Slovakian three-times Olympic champions Pavol and Peter Hochschorner had to settle for bronze after suffering a two-second penalty on their final run.
Elsewhere, British sharp-shooter Peter Wilson kept his composure to clinch the men’s double trap Olympic title.
The 25-year-old shot 188 out of 200 to secure the win ahead of Sweden’s Hakan Dahlby and Russia’s Vasily Mosin.