Novak Djokovic is back at world number one after beating Alexandre Muller in straight sets and Iga Swiatek began her title defence by dropping only one game against Rebecca Peterson.
Britain’s Lily Miyazaki made a mark on her Flushing Meadows debut to reach round two.
Here, the PA news agency looks back at day one at the US Open.
Pic of the day
Former first lady Michelle Obama joined a ceremony to honour former champion and equality campaigner Billie Jean King, and celebrate 50 years since the US Open offered equal prize money to men and women.
Match of the day
Coco Gauff came from a set down in a thriller under the lights on Arthur Ashe against German qualifier Laura Siegemund. The American teenager, seeded sixth, eventually came through 3-6 6-2 6-4.
Shock of the day
Holger Rune tweeted a map of the Flushing Meadows site to highlight his frustration at being shoved out on Court Five. The Danish fourth seed’s irritation was clear as he slumped to a four-set defeat to Spaniard Roberto Carballes Baena.
Stench of the day
It’s a hard court, not grass, but eighth seed Maria Sakkari complained to the umpire about the smell of “weed” wafting through the air during her surprise defeat by Rebeka Masarova.
Brit watch
Lily Miyazaki branded her US Open debut “surreal” after winning her first match at a grand slam.
There were echoes of Emma Raducanu after the 27-year-old qualifier, Britain’s sole representative on day one, beat Russian Margarita Betova 6-3 6-3.
“It’s huge for me, I think,” said Miyazaki. “Qualifying was also, like, obviously a huge confidence booster, but winning at the main draw, it just feels a bit surreal.”
The world number 199 may be unlikely to emulate Raducanu’s fairy-tale title win two years ago, but she still secured a near-£100,000 pay day and a high-profile second-round match against Olympic champion Belinda Bencic.
Fallen seeds
Women: Maria Sakkari (8), Veronika Kudermetova (16), Anhalina Kalinina (28), Elisabetta Cocciaretto (29).
Men: Holger Rune (4), Felix Auger-Aliassime (15), Lorenzo Musetti (18), Alexander Bublik (25), Sebastian Korda (31).
Who’s up next?
Day two sees the other six British hopefuls begin their campaigns. Former champion Andy Murray will be on the Grandstand Court against Frenchman Corentin Moutet. Cameron Norrie, Dan Evans, Jack Draper, Jodie Burrage and Katie Boulter are also in action along with defending champion Carlos Alcaraz.
Sabalenka goes the distance again to progress at Madrid Open
Aryna Sabalenka was forced to go the distance again at the Madrid Open as she battled past Robin Montgomery on Sunday.
Sabalenka, the reigning Madrid Open champion, needed three sets to win her second-round tie against Magda Linette on Friday, and the second seed did not have an easy ride against American Montgomery.
However, she eventually got over the line, triumphing 6-1 6-7 (5-7) 6-4 to tee up a last-16 meeting with Danielle Collins, who defeated Jaqueline Cristian 3-6 6-4 6-1.
Collins has now reeled off 15 straight wins, having won the Miami Open and Charleston Open in recent weeks, and has progressed to the last 16 in Madrid for the first time in her career.
The American said: "I've been doing so well the last couple of weeks, I think the girls know that when they come out and play me, they've got to go for it.
"That certainly was taking place the last two matches, some big shots that I've had to counter, and be able to react quickly."
Data Debrief: Sabalenka up there with Serena
Sabalenka has now won 14 of her 17 matches at the Madrid Open, which she won in 2023 and 2021.
Since the inception of the tournament, only Serena Williams (15) has won more of her first 17 matches at the event.
Alcaraz's pursuit for third straight Madrid Open crown continues by defeating Seyboth Wild
Carlos Alcaraz boosted his hopes of a third straight Madrid Open title as he comfortably beat Thiago Seyboth Wild to reach the fourth round on Sunday.
Back in his home country of Spain, Alcaraz eased to a 6-3 6-3 triumph to set up a fourth-round clash with Jan-Lennard Struff, whom he beat in last year's final.
The first six games of the opening set went to serve, but Alcaraz found a crucial break in the seventh and ninth games of the set to put him in pole position for victory, a lead he would not relinquish as he overcame being broken in the seventh game of the second set to seal his safe progression.
Holger Rune was a surprise casualty as the world number 12 was defeated 6-4 4-6 6-3 by Tallon Griekspoor, though world number eight Andrey Rublev eased through with a straight-sets win over Alejandro Davidovich Fokina.
Data debrief
With his triumph over Seyboth Wild at the Madrid Open, Alcaraz has now won 93.3 per cent of his games at the tournament. That is the highest win percentage of any player with at least 10 games played in a single ATP-1000 event since the format was introduced in 1990.
Against Seyboth Wild, Alcaraz won 27 of his 31 first-serve points, also recording 19 winners to his opponent's 10 as he dominated the contest on his way to victory.
Rybakina eases past Sherif to reach Madrid Open last 16
Elena Rybakina cruised past Mayar Sherif in straight sets to reach the last 16 of the Madrid Open on Sunday.
World number four Rybakina rarely looked like being troubled by Sherif, easing to a 6-1 6-4 triumph, winning 22 of her 26 first-serve points on her way to victory.
The 2022 Wimbledon champion broke Sherif's serve twice in the first set to gain control of the match, before holding her serve five times in the second to ensure victory.
Also into the last 16 in Madrid are Yulia Putintseva and Daria Kasatkina, who beat Caroline Dolehide and Anastasia Pavlyuchenkova respectively, both in straight sets. However, world number seven and reigning Wimbledon champion Marketa Vondrousova is out after she was upset by Mirra Andreeva, losing 7-5 6-1.
Data debrief
In reaching the Madrid Open last 16, Rybakina again showed her class on clay. Her victory over Sherif saw her become only the fourth player in the last 10 years to win 14 straight WTA matches on clay, alongside Serena Williams, Simona Halep and Iga Swiatek.
Additionally, Rybakina's 475 winners at WTA-1000 events in 2024 are 112 more than the next best, Danielle Collins with 363.
SportsMax is the Caribbean sports channel of choice, committed to providing sporting content of the highest quality to the Caribbean, delivered by a team of highly innovative, passionate and qualified professionals.
(876) 619-7629
digitalmedia@sportsmax.tv
