Four Americans, including top-seeded Andre Agassi, advanced to the quarterfinals at the Legg Mason Tennis Classic in Washington. Agassi will be joined in the round-of-eight by Andy Roddick, Mardy Fish and defending champion James Blake.
The world-number-one Agassi cruised to a 6-3, 6-2 win over 13th-seeded Sargis Sargisian of Armenia on the stadium court. The win brings Agassi's lifetime record at this event to 40-9, but despite the score, Agassi says it was not easy.
"No, not easy, it is never easy. But tonight I felt pretty comfortable," he said. " I took care of my serve early and then I really settled down into the other parts of my game and I thought it came around nicely."
Agassi plays defending champion James Blake in the quarterfinals, after his sixth-seeded countryman came back from a loss in the first set to defeat German Lars Burgsmuller, 3-6, 7-5, 6-4.
Earlier, third-seeded Paradorn Srichaphan delighted a flag-waving Thai contingent as he defeated 16th-seeded American Bryan Vahaly 7-6, 6-4. Paradorn appreciated the fans cheering him on.
"It is nice to have good support out there, and it is like, you know, you have some people from your country to support you. So it is great to have somebody behind you," he said.
The Thai player next faces number-10 Tim Henman of Britain, who topped eighth-seeded Russian Nikolay Davydenko, 6-3, 6-4.
Second-seeded Andy Roddick of the United States beat number-14 Greg Rusedski of Britain, 6-3, 7-6. Roddick will play 11th-seeded countryman Mardy Fish, who pulled off the biggest upset of the night with a three-set 6-4, 3-6, 6-3 victory over fifth-seeded Yevgeny Kafelnikov of Russia.
Number-four Fernando Gonzalez of Chile won a hard-fought 7-5, 7-6 duel against Croatia's Mario Ancic, to set up a showdown with Max Mirnyi of Belarus, a 6-1, 6-3 winner over American Mike Bryan.