BEIJING -- Britain's Chris Hoy has taken his third gold medal of the Beijing Olympics, beating teammate Jason Kenny in the men's track cycling sprint.
Hoy, the silver medalist from Sydney and reigning world champion, defeated Kenny in two races in the final at the Laoshan Velodrome to complete a perfect week for him. It was the last gold to be decided in the velodrome and left Britain with seven of the 10 gold medals in track cycling.
The silver was Kenny's second medal. He took gold alongside Hoy in the men's team sprint on Friday.
France's Mickael Bourgain beat Germany's Maximilian Levy of Germany for the bronze.
In the men's madison, Juan Esteban Curuchet and Walter Fernando Perez won gold, giving Argentina its first track cycling medal of the Beijing Olympics
Argentina had eight points Tuesday, one more than silver-medalist Spain and two more than bronze-winning Russia.
It was an upset loss for Britain, the heavy favorites with Mark Cavendish and Bradley Wiggins -- who was bidding to pass Burton Downing of the United States as the most-decorated Olympic track cyclist of all time -- finishing eighth.
The madison is a 200-lap, two-man race where teams collect points in sprints held every 20 laps. Only one rider from each nation is racing at a time.
In the women's track cycling sprint, Britain's Victoria Pendleton beat Australia's Anna Meares for the gold medal.
Pendleton, a three-time world champion in the event, swept Tuesday's best-of-three final, 2-0.
Meares, who suffered a near-catastrophic injury at a World Cup race near Los Angeles seven months ago, won the bronze in the sprint at the Athens Games four years ago.
China's Guo Shuang beat Willy Kanis of the Netherlands for the bronze.