20-year-old Argentinean phenom Juan Martín Del Potro stunned the world last night when he defeated the number one ranked Roger Federer in the final match of the U.S. Open tennis tournament.

After winning both Wimbledon and the French Open, and with second ranked Rafael Nadal ailing from a injury, Federer seemed a shoe-in for his sixth consecutive U.S. Open win. But Del Potro managed to stop him right in his tracks.

At 6 feet 6 inches tall, Del Potro is one of the largest tennis players in the game, and his hard-hitting play seemed to trip Federer up. Del Porto is the first Argentinean to win the U.S. Open since 1977, when Guillermo Vilas took the title. The thrilling match lasted 4 hours 6 minutes, and ended with Del Potro lying flat on his back, long arms extended and crying with joy at his unlikely victory. Congrats, Juan Martín!