UPDATE 1-Tennis-Washington Open men's singles quarterfinal results

Sat Aug 3, 2013 4:26am BST

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Aug 3 (Infostrada Sports) - Results from the Washington Open Men's Singles Quarterfinal matches on Friday 
1-Juan Martin Del Potro (Argentina) beat 7-Kevin Anderson (South Africa) 7-6(0) 6-3 
3-Tommy Haas (Germany) beat 11-Grigor Dimitrov (Bulgaria) 7-6(5) 7-6(3)             
8-John Isner (U.S.) beat 16-Marcos Baghdatis (Cyprus) 6-7(5) 6-4 6-4                
Dmitry Tursunov (Russia) beat Marinko Matosevic (Australia) 6-3 4-6 7-6(4)
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