Tennis

Del Potro's power on display in quarterfinal win

Published Sep. 11, 2009 7:07 a.m. ET

foxsports

Before the rains came to interrupt the evening session, an upset had seemed possible when Marin Cilic led his fellow 20-year-old, Juan Martin del Potro, by a set and 3-1 in the first of the day's quarterfinals.

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