First round singles action concludes on Tuesday in New York.

On Tuesday, which is also his 40th birthday, Gael Monfils will begin his 71st and last Major. But will it be his last match at a Major? The Frenchman has not secured a win at a Major in over a year, and is just 4-9 during 2026. He faces Adolfo Daniel Vallejo, a 22-year-old from Paraguay playing in just his second Major, yet a player who has done plenty of winning this season.

Here’s a rundown of the most notable matches on Day 3 (in chronological order, all times local):

Thea Frodin (WC) vs. Elena Rybakina (2) – 11:00am on Grandstand

Rybakina retired from her quarterfinal match in Cincinnati just over a week ago with a foot injury, but told the press this past week that she is fully healthy for this fortnight. However, this has easily been the worst Major of her career, where she’s just 8-6, and has never been beyond the fourth round. Frodin is a 17-year-old American wild card ranked 580th in the world, who has never won a tour-level match.

Mirra Andreeva (5) vs. Janice Tjen – Second on Louis Armstrong Stadium

The US Open has also been a struggle in the young career of Andreeva, as she’s only 4-3 in New York. Mirra has accumulated 40 match wins on the year, yet is only 4-4 since winning her first Major this past June in Paris. Tjen is a 24-year-old from Indonesia who won an amazing 74 matches last year at all levels, but has hit the dreaded “sophomore slump” during 2026, with a WTA-level record of 11-22. Just a few weeks ago in Cincinnati, Andreeva defeated Tjen in straights.

Arthur Fery vs. Lorenzo Musetti (13) – Second on Grandstand

Musetti has battled multiple injuries this year, resulting in a modest record of 18-10. He is defending quarterfinalist points from a year ago, and would fall out of the top 20 with an early loss this week. Fery was of course the “Cinderella story” of Wimbledon, as a British wild card who advanced all the way to the semifinals. And only a few days ago, he was the runner-up in Winston-Salem, so he comes into this match oozing with confidence.

Zeynep Sonmez vs. Coco Gauff (4) – Not Before 7:00pm on Arthur Ashe Stadium

Gauff is also feeling highly confident, thanks to her title run in Cincinnati, her first tournament win in nearly a year. She’s now 14-2 since the start of The Championships two months ago, and has rebounded nicely since missing an easy put-away on match point during the Wimbledon semifinals. Sonmez is a 24-year-old from Turkey who advanced to the third round of this year’s Australian Open, her best Major result to date.

Adolfo Daniel Vallejo vs. Gael Monfils (WC) – Not Before 7:00pm on Louis Armstrong Stadium

Monfils has advanced to the quarterfinals four times in New York, and went as far as the semifinals in 2016. However, it’s now been seven years since he’s reached the second week, as his body has been suffering from the wear and tear of a long career. Vallejo made his Major debut just a few months ago in Paris, but he’s won 39 matches this season at all levels, though it’s worth noting 34 of those victories have come on clay. Much like Monfils, Vallejo has a strong forehand, and is pretty quick around the court.

Alexander Zverev (1) vs. Lorenzo Sonego – Last on Arthur Ashe Stadium

Zverev went just 2-2 this summer on hard courts, losing 6-4 in the third to Tallon Griekspoor in Montreal, as well as to Tommy Paul in Cincy. After advancing to the quarterfinals in four consecutive US Open appearances, he went out in the third round a year ago to Felix Auger-Aliassime. Sonego is a miserable 3-8 lifetime at this tournament, and an even worse 0-6 against Zverev.

Mary Stoiana (Q) vs. Alexandra Eala (17) – Last on Louis Armstrong Stadium

Armstrong will likely be packed for the uber-popular 21-year-old Filipino, who has enjoyed a groundbreaking summer. At Wimbledon, Eala become the first Filipino player to achieve the round of 16 at a Major in the Open Era. And just a few weeks later, she captured the biggest title of her career in Washington, with victories over Elina Svitolina, Naomi Osaka, and Jessica Pegula. Stoiana is a 23-year-old American who came through qualifying, and is making her Major debut.

Tuesday’s full Order of Play is here.