Del Potro punches above his weight

Argentine upstart bounces Federer from US Open

NEW YORK - Juan Martin Del Potro soaked up the adulation of his supporters on Wednesday after defeating Roger Federer in their US Open quarterfinal to book a semifinal showdown against top-ranked Rafael Nadal.

Argentine Del Potro, seeded 28th, vanquished the 19-time Grand Slam champion 7-5, 3-6, 7-6(8), 6-4 in Arthur Ashe Stadium, a court where Federer has dominated rivals for more than a decade.