Houston Open ATP results (updated)

Following are the results Thursday from the US Men's Clay Court Championship at River Oaks Country Club (prefix number denotes seedings):

Men's singles

Second round

6-Fernando Verdasco, Spain, bt Chung Hyeon, South Korea, 7-6 (7/5), 6-2

Teimuraz Gabashvili, Russia, bt 4-John Isner, United States, 6-2, 7-6 (7/2)

Jack Sock, United States, bt 2-Roberto Bautista Agut, Spain, 6-4, 6-4.

5-Santiago Giraldo, Colombia, bt Janko Tipsarevic, Serbia, 7-6 (2), 6-3.

Men's doubles

Quarterfinals

Ricardas Berankis, Lithuania/Teymuraz Gabashvili, Russia, bt 1-Bob/Mike Bryan, United States, 7-6 (7), 7-5.

Treat Huey, Philippines/Scott Lipsky, United States, bt Johan Brunstrom, Sweden, and Donald Young, United States, 5-7, 6-4, 10-7. Endi