Photo favourites Eugenie Bouchard and Ana Ivanovic eased into the US Open second round on Tuesday while five-time champions Roger Federer and Serena Williams were set to take centre stage under the Arthur Ashe Stadium lights.
Canadian seventh seed Bouchard, the Wimbledon runner-up, eased past Olga Govortsova of Belarus 6-2, 6-1, slamming the brakes on her post-All England Club slump which had brought her just one win coming into New York.
Bouchard is one of four Canadians in the main draw this year, the most since 1989 and is aiming to keep up her record of having made at least the semi-finals at all the majors in 2014.
Former French Open champion Ivanovic, the eighth seed, eased past Alison Riske of the United States, 6-3, 6-0 in a tie which featured eight breaks of serve.
It was a performance which suggested the Serb is getting back close to her best in a year which has seen her beat Serena Williams in the Australian Open fourth round, claim three titles and return to the world's top 10 for the first time in five years.
"Last year has been an amazing change for me. I learned a lot about myself, about my goals, who I am as a person and who I want to be," said Ivanovic, a US Open quarter-finalist in 2012.
In early men's action, John Isner, the highest-seeded American at 13 and who is hoping to be his country's first major winner since Andy Roddick at the US Open in 2003, saw off compatriot Marcos Giron 7-6 (7/5), 6-2, 7-6 (7/2).
Japanese 10th seed Kei Nishikori, a first round loser in 2013, went through by beating America's Wayne Odesnik 6-2, 6-4, 6-2.
However, the most impressive victory was by 17-year-old Croatian, Borna Coric, the 2013 junior champion, who marked his Grand Slam debut by beating Czech 29th seed Lukas Rosol, 6-4, 6-1, 6-2.
Coric, ranked at 204 and who qualified for the tournament, goes on to face 34-year-old Victor Estrella Burgos who is making his US Open debut and is the first player from the Dominican Republic to feature at a major.
Federer, seemingly down and out in New York 12 months ago after suffering his earliest loss at the tournament for a decade, begins his 15th US Open later Tuesday as one of the favourites.
The 33-year-old Swiss, bidding to become the oldest major winner in more than 40 years, faces explosive Australian Marinko Matosevic who he beat in their only other previous meeting at Brisbane earlier this year.
Playing in a record 60th consecutive major, Federer boasts a 22-1 record in New York night sessions.