Cincinnati Masters: John Isner rallies for upset of Juan Martin del Potro

Updated: 18 August 2013 10:13 IST

The 6-foot-10 (2.08-meter) American made sure of that Saturday, rallying to beat seventh-seeded Juan Martin del Potro 6-7 (4), 7-6 (9), 6-3 in a grueling Western & Southern Open semifinal.

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