September 14, 2009: The day Del Potro stunned five-time defending champ Federer in five sets to win the US Open

On this day, September 14, 2009, Juan Martin del Potro defeated five-time defending champion Roger Federer in the final of the US Open (3-6, 7-6, 4-6, 7-6, 6-2) to claim his first and only Grand Slam title. Del Potro became only the second man, till that time, to beat Federer in a Grand Slam final, Rafael Nadal being the first. This 2009 US Open was, since 2005, only the third Grand Slam...

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