07:45 CET - Men's second seed Carlos Alcaraz is safely through to the second round in New York after an assured 6-4, 7-5, 6-4 victory over big-serving American Reilly Opelka.
The 2022 champion, who has now won 55 matches this year, faces Mattia Bellucci next.
05:05 CET - Back on the men's side, 31st seed Gabriel Diallo beats Damir Dzumhur 7-6, 4-6, 7-5, 7-5 to advance to the next round. It's worth noting that Diallo had trouble following the match, with his team helping get his bags off the court.
05:00 CET - Women's 5th seed Mirra Andreeva finishes her match against Alycia Parks in just 55 minutes, winning in straight sets 6-0, 6-1.
03:25 CET - Despite winning the second set, Venus Williams ultimately falls to Karolina Muchova 6-3, 2-6, 6-1. It's Muchova's 45th Grand Slam win.
03:20 CET - 12th seed Casper Ruud rolls through to the next round after defeating Sebastian Ofner 6-1, 6-2, 7-6, making it 25 career wins at the US Open.
02:45 CET - Men's 9th seed Karen Khachanov defeats Nishesh Basavareddy 6-7, 6-3, 7-5, 6-1. Meanwhile, 15th seed Andrey Rublev takes down Dino Prizmic in straight sets 6-4, 6-4, 6-4.
02:35 CET - Staying on the women's side, both Zeynep Sonmez and Peyton Stearns advance after straight set wins in their respective matchups.
02:25 CET - Anna Bondar upsets 12th seed Elina Svitolina in straight sets 6-2, 6-4. This is Bondar's second-biggest upset of the summer, with her first back in June when she knocked off top-seed Ekaterina Alexandrova.
02:00 CET - Over on the women's side, Elsa Jacquemot and Magdalena Frech both defeat their opponents in straight sets.
01:20 CET - Jan-Lennard Struff, Kamil Majchrzak, and Tristan Boyer all take home a win.
01:15 CET - After almost a four-hour match, Jenson Brooksby defeats Aleksandar Vukic 6-3, 6-7, 6-4, 3-6, 6-4.
00:30 CET - Holger Rune knocks out Botic Van De Zandschulp after a hard-fought straight sets 6-3, 7-6, 7-6.
00:15 CET - Staying on the men's side, Jaume Munar defeats Jamie Faria 6-0, 6-3, 5-7, 6-2.
00:05 CET - Home hero Frances Tiafoe, a man who loves this tournament, has advanced with a convincing straight-sets win, as has Maria Sakkari.
23:12 CET - 15th seed Daria Kasatkina and 29th seed Anna Kalinskaya have both moved into the next round, while American talent Alex Michelsen has been knocked out on the men's side.
22:47 CET - In the final match of her career, Caroline Garcia has lost 6-4, 4-6, 6-3 to Kamilla Rakhimova. The former world number four really went down with a fight tonight.
22:03 CET - Fifth seed Jack Draper has come through a tougher test than he would have been expecting, beating qualifier Federico Agustin Gomez 6-4, 7-5, 6-7, 6-2.
20:53 CET - Reigning Australian Open champion Madison Keys out! In a huge disappointment for the home crowd, the world number six has lost 6-7, 7-6, 7-5 to Renata Zarazua after just over three hours of play.
Elsewhere in Flushing Meadows, Ninth seed Elena Rybakina has beaten American wildcard Julieta Pareja 6-3, 6-0 and young star Joao Fonseca has claimed a hard-fought 7-6, 7-6, 6-3 win over Miomir Kecmanovic.
20:02 CET - Anastasia Pavlyuchenkova has battled into the second round, outlasting Dayana Yastremska 6-7(5), 7-6(5), 6-4 in two hours and 40 minutes.
19:28 CET - Qualifier Lloyd Harris is through in New York after a mightily impressive 6-3, 7-5, 6-4 triumph over Sebastian Baez.
Meanwhile, on the women's side of the tournament, Yulia Putintseva has beaten Elisabetta Cocciaretto in straight sets, 6-4, 7-6(4).
19:06 CET - Cameron Norrie has progressed to the second round after his opponent Sebastian Korda was forced to retire with a back injury while trailing by two sets, 7-5, 6-4.
19:03 CET - American qualifier Martin Damm is the first man through today after a dominant 6-3, 6-4, 6-4 victory over wildcard and compatriot Darwin Blanch.
18:37 CET - Former Wimbledon and French Open champion Barbora Krejcikova has provided a reminder of her incredible quality, with the Czech outclassing Canadian sensation and recent Montreal winner Victoria Mboko.
Krejcikova triumphed 6-3, 6-2 and will face Japan's Moyuka Uchijima in the second round.
18:10 CET - In what was the final match of her career, two-time former Wimbledon champion Petra Kvitova has been soundly beaten by Diane Parry, 6-1, 6-0 in just 53 minutes.
Despite a disappointing result today, the Czech leaves the sport with a superb legacy, winning 31 singles titles and reaching a career-high No. 2 in the world.
17:07 CET - Play is now underway in New York as the second day of the US Open gets started!
Follow all the women's matches here and the men's action here.
16:00 CET - The first matches of the day will be getting underway in an hour, and the standout clash among them is the one between Barbora Krejcikova and Victoria Mboko.
Krejcikova, a former world number two and two-time Grand Slam champion, enjoyed her best week in a while at the Cincinnati Open, reaching the fourth round with some impressive wins.
18-year-old Mboko meanwhile is one of the stories of the season, winning the Canadian Open and climbing up to 23rd in the world after being ranked outside the top 300 at the start of the year.
The teenager will be the favourite for the first meeting between the two, but we could be in for some game if Krejcikova can produce her best tennis.
You can read more about the match and follow every point of it here.
15:15 CET - Hello and welcome to Flashscore's coverage of the second day of the US Open!
The action will get underway in two hours, and there are plenty of top players taking to the court early in the day. Men's world number five Jack Draper is going up against Federico Agustin Gomez at 18:30 CET, an hour after women's world number six Madison Keys takes on Renata Zarazua and 30 minutes before Elena Rybakina begins her match against Julieta Pareja.
After that will come an evening session headlined by Carlos Alcaraz and Venus Williams, who will be taking on Reilly Opelka and world number 13 Karolina Muchova respectively.