Andy Roddick [Images] blew away fellow American Robby Ginepri 6-2, 6-3 on Thursday to move into the third round of the Memphis Championships.

The big-serving Roddick was delighted after recording 11 aces and serving no double faults.

"That's the best I've ever played," he told reporters. "I was in a zone out there. I hit every forehand as hard as I could and it was going in every time. It's as simple as that."

Top-seeded Roddick, who lost in the semifinals of last week's San Jose Open, outplayed his compatriot, breaking Ginepri's serve a total of eight times.

Ginepri occupied the court for just over an hour. He fell behind early as he struggled with his serve and Roddick attacked a vulnerable second serve.

Roddick, the world number six, lost just eight points on his potent first serve.

"I (could) sense that (Ginepri) was kind of like, 'we both know you're not this good,'" Roddick said. "I wish I could play like that every time."

Trying to capture the title in his ninth appearance at The Racquet Club, Roddick will meet American Sam Querrey in the quarterfinals in a matchup of two big servers.

Querrey defeated Cypriot Marcos Baghdatis [Images] 6-1, 6-2.

Australian Lleyton Hewitt [Images] beat compatriot Chris Guccione 6-2, 7-6, one day after upsetting third seed James Blake [Images]. Hewitt tallied 10 aces in his quest to win the first title since 2007.

He will have to get past Belgium's Christophe Rochus, who upset No. 7 seed Mardy Fish [Images] 6-2, 6-4.

In other matches, San Jose Open winner Radek Stepanek defeated Stefan Koubek 6-2, 6-4, number two seed Juan Martin Del Potro beat Ernests Gulbis 6-3, 6-4, Igor Kunitsyn outlasted Philipp Petzschner 3-6, 6-4, 6-4 and Dudi Sela defeated Florent Serra 7-6, 7-6.

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