05:35 CET - Needing four sets, Novak Djokovic improves his record versus Taylor Fritz to 11-0 after beating the American 6-3, 7-5, 3-6, 6-4 in nearly three and a half hours. He will face Alcaraz in the semi-finals.
00:45 CET - Venus Williams and Leylah Fernandez's run in doubles is over. The number one pair of Katerina Siniakova and Taylor Townsend march into the semi-finals after winning 6-1, 6-2 in a little under an hour.
23:18 CET - Some devastating news is just breaking: Marketa Vondrousova has had to withdraw from her quarter-final clash with Aryna Sabalenka tonight, likely due to injury. For a player who has suffered from so many fitness issues during her career, it is a heartbreaking turn of events.
As a result, defending champion Sabalenka move into the semi-finals, and she will face Jessica Pegula in a re-run of last year's final.
21:34 CET - Carlos Alcaraz is in truly imperious form. The Spaniard hasn't dropped a set all tournament, and has now dispatched of Jiri Lehecka in just under two hours, 6-4, 6-2, 6-4. The former champion is back in the semi-finals in New York after winning the title in 2022.
19:10 CET - Despite coming into the tournament in iffy form, world number four Jessica Pegula has been magnificent at the US Open, and she has now booked her spot in the semi-finals after claiming a comfortable 6-3, 6-3 victory over Barbora Krejcikova in an hour and a half.
After losing in the final last year, she is a win away from reaching that stage again, but she faces a potential rematch with Aryna Sabalenka next - should she beat Marketa Vondrousova later tonight.
17:40 CET - So, who is ready for the start of the US Open quarter-finals? The first WTA quarter-final is moments away as home-favourite Jessica Pegula takes on Barbora Krejcikova.
Follow the match here with Flashscore.
14:40 CET - Hello and welcome back to our coverage of the 2025 US Open! Today, the quarter-finals get started in both the men's and women's singles tournaments at Flushing Meadows.
The schedule is thinning out as the competition wears on, but the stakes are only getting higher. There will be four matches today - two men's quarter-finals and two women's.
The action gets going from 17:30 CET as women's fourth seed Jessica Pegula takes on Barbora Krejcikova. Then, at 19:00 CET, men's second seed Carlos Alcaraz takes on Jiri Lehecka.
In the later matches, top seed Aryna Sabalenka faces Marketa Vondrousova at 01:00 CET, before Novak Djokovic closes out the day against home hope Taylor Fritz. What a day ahead!
Not sure which match to prioritise? Check out our daily highlights here!
You can follow all the women's action here and the men's here.