Bob and Mike Bryan added an Olympic gold medal to their 11 Grand Slam titles with a 6-4 7-6 win over France's Jo-Wilfried Tsonga and Michael Llodra in the men's doubles at Wimbledon.
It was a second tennis gold for the United States on Saturday, after
Serena Williams beat Maria Sharapova in the women's singles.
France's Julien Benneteau and Richard Gasquet won the bronze medal.
The pair beat Spaniards David Ferrer and Feliciano Lopez 7-6 (7-4) 6-2.
After a closely fought first set, Benneteau and Gasquet broke twice in a row to take a comfortable lead in the second, before securing the win.