LAS VEGAS (AP) - Fernando Verdasco of Spain advanced to the quarter-finals of the Tennis Channel Open with a 6-1, 5-7, 6-2 victory over Thailand's Danai Udomchoke during round-robin play Wednesday.
The fifth-seeded Verdasco had four double faults while losing the second set, and then took advantage of Udomchoke's four double faults in the third. Verdasco also defeated Paul-Henri Mathieu of France in three sets on Monday, finishing 2-0 in his round-robin group.
"I was a little bit unfocused in the second set," Verdasco said. "After losing the second set, I asked if I needed to win. When they said 'yes,' that refocused me."
Also, eighth-seeded Benjamin Becker of Germany defeated Gustavo Kuerten of Brazil, 6-4, 6-3.
Kuerten, ranked No. 1 on the ATP Tour on Dec. 4, 2000, underwent hip surgery in 2004. He competed in just one singles match last year and only got back on the court last month in Chile.
In other matches, unseeded Sam Querrey beat sixth-seeded Julien Benneteau of France, 6-2, 7-6 (3); fourth-seeded Jurgen Melzer of Austria defeated Michael Llodra of France, 6-4, 2-6, 7-5; Igor Kunitsyn of Russia beat Stefan Koubek of Austria, 6-2, 6-2; and Feliciano Lopez of Spain got past Nicolas Mahut of France, 3-6, 6-3, 7-6 (3).