Men's round-up - day one
Former champion Lleyton Hewitt wasted little time booking his place in round two at the US Open.
The sixth seed crushed Romania's Victor Hanescu 6-3 6-2 6-2 in the night match at Flushing Meadows.
"I feel like I'm hitting the ball pretty well at the moment," said the Australian, who reached the semi-finals last year.
"t was an awkward sort of game, but I felt like I was in control.. For me too take care of him that easily was pretty nice."
Argentina's Guillermo Coria, the fifth seed, also had few problems beating compatriot Mariano Puerta 6-4 6-3 6-1.
Ninth seed Sebastien Grosjean was the first big name to lose in the men's draw, going down in five dramatic sets to Ramon Delgado of Paraguay.
The Frenchman, who beat Tim Henman on his way to the semi-finals at Wimbledon, came into the match after struggling recently with elbow problems.
But Grosjean had his chances against Delgado, failing to convert two match points in the fourth set before going down 6-4 6-7 4-6 7-6 6-4.
"It's really disappointing having come so close, but even if I'd won, I wouldn't have liked my chances," said the Frenchman. "You've got to be physically 100% in a Grand Slam."
Juan Carlos Ferrero was the first of the leading men to make round two with a four-set win over Jan Vacek.
The Spaniard, seeded third, was not at his best, dropping the second set before coming through 6-2 4-6 6-3 6-2 against the unseeded Czech.
Ferrero will next meet Jurgen Melzer of Austria, who beat American Brian Baker 6-3 6-3 5-7 6-4.
Fellow Spaniard Tommy Robredo, seeded 17, suffered a surprise defeat to compatriot Fernando Verdasco.
Robredo went down 6-3 6-4 6-2, and Verdasco will go on to play Davide Sanguinetti of Italy, who beat Spaniard Ruben Ramirez Hidalgo 4-6 6-0 3-6 6-1 6-1.
American Mardy Fish had no trouble with Joachim Johansson of Sweden, coming through 6-3 6-2
The 24th seed will take on Karol Kucera in the second round after the Slovakian beat Alexander Popp 6-2 7-5 6-3.