Top seed and 2002 champion Andy Roddick defeated Benjamin Becker of Germany 7-6(4), 6-4, in one hour and 17 minutes to move into the quarterfinals in Memphis for the sixth straight year. It is also the first time in five years the top four seeds have reached the quarterfinals in Memphis.

Roddick fired 14 aces and his serve was dominant, losing only six points in 11 service games. The 24-year-old American never faced break point and in the second set he won 20 of 21 service points. The only break in the match came in the third game of the second set as Becker was broken at 15-40.

Roddick, who improved his career record to 19-7 in Memphis, will face Yen-Hsun Lu of Chinese Taipei for the first time. Lu reached his first ATP quarterfinal of the season as sixth-seeded Jurgen Melzer of Austria retired with a stomach virus trailing 6-7(2), 1-1.

"He served just as big as I did today. I thought I outplayed him from the baseline for the most part," said Roddick. "I started hitting my forehand better in the tiebreaker and through the second set and that was probably the difference. He’s good. His quick rise through the rankings isn’t surprising. If you have someone who serves well, returns well, moves okay and hits the ball well from the baseline and is able to be aggressive, that's a good recipe for a successful player."

" I was pretty comfortable on serves today, but the big thing was I wasn’t getting myself in holes. I wasn’t having to dig myself out of
love-15 and 15-30 situations so I kept myself ahead on my serve which was good."

Second-seeded and defending champion Tommy Haas needed two tie-breaks to defeat American Amer Delic in an one hour and 27 minute match, which did not include a break point for either player. The 28-year-old German went to 12-2 on the season and he will enter his third quarterfinal against wild card Sam Querrey.

Haas, who won each tie-break 7-2 and 7-5, had a streak of 37 first serve points won in a row going back to his first round victory against Vincent Spadea until five-all in the opening set. For the match, Haas won 90 percent of first serve points (47 of 52).

"Neither of us faced a break point today and whenever one of us was down 15-30 we came up with the goods," said Haas. " We both served really well and in the end it came down to me winning a couple of big points in the tie-break. I'm serving really well. I haven't been broken in two matches and my first serve percentage has been high."

Third-seeded Andy Murray improved his match record to 14-2 on the season with his seventh straight match victory as he defeated Kristian Pless for the second week in a row, 6-3, 7-6(4). Murray converted the only break in the eighth game of the opening set and he saved the lone break point he faced in the second set. The 19-year-old British No. 1 hit 11 aces and made 1 of 11 break points in the one hour and 33 minute match. Murray, who won 26 of 29 first serve points (90%), will face Austrian Stefan Koubek for the first time in the quarterfinals.

"I only gave up one break point the whole match so it was a good serving day for me," said Murray, who is appearing in his third ATP quarterfinal of the season. "I felt like I was getting opportunities. It’s important against the lower ranked guys to take the opportunities especially at the end of the sets because they’re a little bit nervous. It’s not that it’s not a big match for me, but if he wins it his ranking moves maybe 15 slots but I’m just defending my ranking. So it’s important at the end of sets to stay solid and not to give away too many cheap points."

On going into the quarterfinals, Murray said, "I would love to win my next match. My longest win streak last year was seven and I’d like to try and go one better and put myself in a position where I have a chance of winning a tournament. I feel like I’m hitting the ball better. I just need to play a little bit more aggressively on the break points. I felt much more comfortable out there today."

In other second round play, fourth-seeded Mardy Fish fired 22 aces en route to a 6-1, 7-6(9) victory over Argentine teenager Juan Martin del Potro. Fish improved to 11-3 on the season by reaching his fourth quarterfinal (or better) in as many tournaments. Fish only lost one point on his first serve, winning 31 of 32 points in the one hour and 17 minute match. Fish will play Russian qualifier Teimuraz Gabashvili in the quarterfinals.

"I served great today. I served better than I have all year," said Fish. "It’s as good as I can serve. I served really well in the tiebreaker….both of us did. The tiebreaker was real high quality and I think whoever gets through that tiebreaker is lucky to get through that set. I feel like I’m playing the best tennis I’ve ever played. I’m putting myself in situations to win and be consistent in every tournament. This year more than any year I’m handling the matches and putting myself in real good position to go further."

Fish had praise for the youngest player in the ATP Top 100 Rankings: "This is the best start I’ve ever had. I knew today going in that he’s the youngest guy in the Top 100 and there’s an obvious reason for that," said Fish. "I think anyone watching the match can see that this kid is going to be real good. I’ve played quite a few more matches out here than he has and feel like I can understand situations a little more than he can but that will change for sure. I have a lot of respect for that kid what he’s done already. It speaks volumes that he’s 18 years old and I can’t even fathom doing that at 18. I was struggling to win matches in qualies and Futures. I’ve got a lot of respect for guys that come up that early. Everyone can see he’s got a good game and that was a tough one to get through today and a day when I knew it would be one of the tougher matches I’d have in the tournament.

American teenager Sam Querrey connected for a career-high 22 aces in his 6-3, 6-4 victory over seventh-seeded Julien Benneteau of France. The 19-year-old Californian saved nine break points in the one hour and 22 minute match, including seven in the opening set. Querrey will be playing in his first career ATP quarterfinal and he will be trying to post his first Top 10 win over No. 9-ranked Haas.

"At first I went to six deuces because I couldn’t get a first serve in," said Querrey. "But I fought my way through it and finally my serve picked up.
After that I don’t think he even came close to breaking me at all. My confidence is the biggest thing that has helped me. Every match I play my game is better, the more you play."

On reaching his first ATP quarterfinal, Querrey added, ""My dad always gets the first call. He was playing golf and he walked in and brought it up on the computer on match point."