NEW YORK (September 14, 2009)--Juan Martin del Potro has ended Roger Federer's run of dominance at the U.S. Open, stunning the top-ranked Swiss great in five sets to win in his first Grand Slam final.

The 20-year-old Argentine prevailed 3-6, 7-6 (5), 4-6, 7-6 (4),
6-2 on Monday night to snap Federer's streak of five straight U.S.
Open titles. The sixth-seeded del Potro had been 0-6 in his career
against Federer.

Federer had won 40 consecutive matches at Flushing Meadows. He
was seeking to become the first man since Bill Tilden in 1920-25 to
win the American championship six straight times and the first man
since Rod Laver in 1969 to win three straight majors in a season.

Del Potro upset No. 3 Rafael Nadal in the semifinals in straight
sets.