Roddick Powers Into Quarterfinals at ATP Houston

Top-seeded Andy Roddick improved his career record to 5-0 versus American countryman Wednesday at the ATP stop in Houston with a 7-6(6), 6-4 win to advance to the quarterfinals at the U.S. Men's Clay Court Championships.

"He keeps coming up with new ways to try to beat me, and I keep trying to figure out ways to hold him off," Roddick said. "I got by tonight with a couple of points. I'm scratching and clawing and trying to keep it that way."

Ginepri came back from 3-6 in the tiebreak to level it at 6-6 before Roddick clinched the set.

"It's his serve, he seems to find a way to win," Ginepri said. "The last few times we've played, he wins the tiebreakers. It seems to take the momentum away from me. You've got to keep fighting. One of these days it will come."

Other winners on the day were (3) Tommy Haas (d. Morrison), (7) Jurgen Melzer (d. (Q) Okun from a set down), and (8) Luis Horna (d. (LL) Goldstein in three).

On tap for Thursday in Houston are Calatrava vs. (2) Agassi, (WC) Blake vs. Dupuis, (6) Grosjean vs. O.Hernandez, and K.Kim vs. (Q) N.Lapentti.