HOUSTON (AP) -- Results Tuesday from the US Men's Clay Court Championship at River Oaks Country Club (seedings in parentheses):
Santiago Giraldo (5), Colombia, def. Rogerio Dutra Silva, Brazil, 6-2, 6-2.
Jeremy Chardy (7), France, def. Dusan Lajovic, Serbia, 6-4, 6-4.
Hyeon Chung, South Korea, def. Facundo Arguello, Argentina, 6-3, 7-5.
Teymuraz Gabashvili, Russia, def. Tim Smyczek, United States, 6-3, 6-3.
Treat Huey, Philippines, and Scott Lipsky, United States, def. Eric Butorac, United States, and Sam Groth (2), Australia, 7-6 (4), 6-7 (2), 12-10.