Ryan Cochrane of Canada finished second, while Oussama Mellouli of Tunisia took bronze.
CNN: Phelps nets gold in last race; British hosts bank six
2.
Gold in the men's open water 10-kilometer swimming marathon in the Serpentine, the lake in London's Hyde Park, went to Tunisian Oussama Mellouli.
CNN: August 10, 2012 -- Updated 2336 GMT (0736 HKT)
3.
Mellouli's victory in the grueling race, in front of hundreds of spectators living the banks of the Serpentine, gave Tunisia its first gold medal of the 2012 London Games.
CNN: August 10, 2012 -- Updated 2336 GMT (0736 HKT)