Third seed Lleyton Hewitt handed out a crushing defeat to former French Open champion Albert Costa in the first round of the US Open on Wednesday.
The 24-year-old Australian looked in top form as he opened his campaign in the Arthur Ashe Stadium.
Hewitt hit eight aces and 23 winners on his way to a 6-1 6-2 6-1 victory and he faces Jose Acasuso next.
"It was extremely difficult conditions - you want to get back into the locker room as quickly as possible," he said.
Hewitt pulled out of the Montreal Masters in early August with a stomach ailment but is not concerned by a lack of matches.
"I couldn't have played less than I played before Wimbledon, and as soon as I got in the big matches I knew what to do," he said.
"The bigger the points got, the better I played. Hopefully that's going to be the same here."
Mark Philippoussis, who got the wild card that might have gone to Britain's Andy Murray, went down 6-4 6-2 7-5 to Karol Kucera.
But the Australian insisted he will not throw in the towel as he recovers from yet another injury - a ligament problem in his right leg.
"I'll do whatever it takes to get back and be where I want to be," said the 28-year-old. "It's not like I've got too much pride to play challengers. It's ridiculous. If I have to do that, then I have to do that."
American Taylor Dent, seeded 25th, beat Lars Burgsmuller 6-3 3-6 6-1 6-4.
"You've got to make do and try to handle whatever anybody throws at you," said Dent. "I just consider it a victory getting out there and toughing it out and coming through with the win."
David Ferrer of Spain, the 17th seed, battled to a 4-6 6-4 6-7 (4-7) 6-1 6-1 win over Argentina's Agustin Calleri.
Nicolas Massu became the first man into round three when he had a walkover after 23rd seed Jiri Novak withdrew with an ankle injury.
And Kenneth Carlsen picked up the dubious honour of the most first-round defeats at Grand Slam tournaments with a 7-6 (7-4) 7-5 6-4 defeat to Spain's Nicolas Almagro.
The Dane overtakes Spain's Javier Sanchez with a total of 28 opening defeats at Slams.