Top seed Juan Martin Del Potro, playing twice in one day for the first time in his career, reached the quarter-finals of the Washington Open with two straight-set triumphs.
Juan Martin Del Potro of Argentina serves against Ryan Harrison during the Citi Open at the William H.G. FitzGerald Tennis Center in Washington, DC, on August 1, 2013. Del Potro won 6-1, 7-5 in 70 minutes.
The 2009 US Open winner, a two-time Washington champion, on Thursday dispatched American Ryan Harrison 6-1, 7-5 in 70 minutes, then returned five hours later to eliminate Australian 14th seed Bernard Tomic 6-3, 6-3 in 69 minutes and advance at the combined ATP and WTA event.
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