WASHINGTON, Aug. 6 (UPI) --
Andy Roddick picked up his 500th career victory Thursday, a win that moved him into the quarterfinals of the Legg Mason Classic.
Roddick, the top seed and a three-time winner of the event, survived a difficult battle with Sam Querrey 7-6 (7-4), 6-4. Querrey won last week's tour stop in Los Angeles.
The only other active players with 500 victories are Roger Federer, Carlos Moya and Lleyton Hewitt, who lost Thursday to second-seeded Juan Martin del Potro 6-4, 3-6, 7-6 (7-2).
Roddick's quarterfinal opponent will be Ivo Karlovic, who defeated Somdev Devvarman 7-5, 6-1. Del Potro will next meet Robin Soderling, who survived against Marc Gicquel 7-5, 5-7, 6-3.
Another quarterfinal will pit Fernando Gonzalez against Tommy Haas. Gonzalez was a 6-2, 6-4 winner over Wayne Odesnik, and Haas defeated Juan Carlos Ferrero 7-5, 2-6, 6-1.
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