Men's round-up - day four
Top seed Andre Agassi proved too strong for Sweden's Andreas Vinciguerra as he powered past the Swede in straight sets at the US Open.
The American was made to work hard at times by his resilient opponent, but ultimately his class told as he won 7-6 6-1 6-4 to reach the third round.
Agassi, the oldest man in the field at age 33, now faces a third-round tie against Russia's Yevgeny Kafelnikov in a rematch of the 2000 Australian Open final.
Earlier, Lleyton Hewitt overcame a shaky start to beat Hyung-taik Lee in four sets.
The number six seed, who has struggled to find his form since losing his world number one spot, looked out-of-sorts in the opening set allowing his Korean to take full advantage.
Hewitt found his range in the second and third sets, dictating the game from baseline and reminding his critics that he still has the ability to challenge for the US crown.
The Australian was forced to work hard against his gutsy opponent to take the final set, completing a 7-5 2-6 2-6 4-6 victory with a thunderous serve.
"For me the first few rounds are toughest," said a delighted Hewitt, who won the US Open in 2001.
"But I know what you have to do to win slams, I'm through to the third round, I can't complain.
"Obviously Wimbledon was a hiccup and I'll try to bounce back at the last major," he added.
Hewitt will now meet the winner of the clash between Radek Stepanek and Fabrice Santoro.
French Open champion Juan Carlos Ferrero joined Hewitt in the third round, beating Austria's Jurgen Melzer 1-6 7-6 (7/2) 6-2 6-4.
The victory sends the third seed into a clash with Argentina's Juan Ignacio Chela, who eliminated Czech qualifying lucky loser Tomas Berdych.
It took Ferrero two hours and 27 minutes to eliminate Melzer, who fired 19 aces but connected on only half his first serves.
But Ferrero was able to crack him on just three of 13 break-point chances.
America's Robby Ginepri added to his growing reputation by ousting 23rd seed Wayne Ferreira 6-2 6-4 6-7 6-2.
Thailand's Paradorn Srichaphan brushed aside Slovakia's Dominik Hrbaty 6-4 6-4 6-3.
Srichaphan will now meet either Davide Sanguinetti or Spaniard Fernando Verdasco.
"Like I said every day, it's nice to have support out
there," said the eleventh seed.
"In best-of-five matches you need somebody behind your back to help you keep fighting because you never know how long the match is going to be," he added.
Russian Yevgeny Kafelnikov fought his way back from a set down to defeat Denmark's Kenneth Carlsen 4-6 6-2 6-3 6-3.