Tommy Robredo falls in Houston

[truebluefan]

Santiago Giraldo

Santiago Giraldo upset second-seeded Tommy Robredo 6-3, 6-4 on Thursday to advance to the quarterfinals of the U.S. Men's Clay Court Championship.

Giraldo will face Alejandro Gonzalez on Friday at River Oaks Country Club. Gonzalez advanced when fifth-seeded Feliciano Lopez retired because of severe allergies. Gonzalez led 6-3, 2-0.

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