World No 1 Iga Swiatek faces Aryna Sabalenka in the second US Open women’s semi-final, while Ons Jabeur and Caroline Garcia meet in the other.
Top seed Swiatek, who won her second French Open title this year, is the only major champion among the four players. She is also the first No 1 seed to reach the US Open semifinals since Serena Williams in 2016.
Sabalenka is the only player who has previously reached the last four in Flushing Meadows. The 6th seed lost last year to eventual runner-up Leylah Fernandez.
Jabeur, the 5th seed from Tunisia, reached her first Grand Slam final this summer at Wimbledon. Garcia is in her first major semi-final and playing as well as anyone. The 17th seed from France stretched her winning streak to 13 matches by beating Coco Gauff in the quarter-finals. She has not dropped a set in the tournament.
When is the US Open?
The tournament began at Flushing Meadows on Monday, August 29 and will finish on Sunday, September 11.
What happened to the Brits?
In total, seven Britons gained direct entry into the singles draws, although as the tournament reaches the midway point just one remains standing after British No 1 Cameron Norrie reached the fourth round for the first time but was beaten in straight sets by Russian Andrey Rublev on Monday.
Andy Murray reached the third round where he lost in four sets to the big-serving Italian Matteo Berrettini, while rising star Jack Draper‘s run ended when he retired injured in his third-round match with Karen Khachanov.
Kyle Edmund, playing singles at a grand slam for the first time in two years following three knee operations, was knocked out in straight sets by fifth seed Casper Ruud, while 20th seed Dan Evans lost to 2014 US Open champion Marin Cilic over four sets in the third round.
In the women’s singles, defending champion Emma Raducanu crashed out in straight sets to Alize Cornet in the first round, while Harriet Dart secured a superb upset win over 10th seed Daria Kasatkina before being dumped out in round two.
What TV channel is it on in the UK?
Amazon Prime Sport has exclusive rights to the US Open. A subscription to Amazon Prime Video costs £7.99 a month, with a 30-day free trial. You can also get unlimited streaming access to Amazon Prime Video as part of a full Amazon Prime membership, which costs £79 a year or, to avoid a lengthy annual contract, £7.99 a month.
Replays will be available around 15 minutes after each match ends and there will be daily highlights.
Alternatively, you can return to follow all the key games on our dedicated live blogs.
How can I watch it in the US?
In the US live coverage of the last grand slam of the year is exclusive to ESPN and ESPN2. However, the Tennis Channel will also show encore matches and other non-live programming.
What is the order of play on day nine?
All times BST
Arthur Ashe Stadium
00:00: (17) Caroline Garcia (Fra) v (5) Ons Jabeur (Tun), (1) Iga Swiatek (Pol) v (6) Aryna Sabalenka (Blr)
Louis Armstrong Stadium
17:00: (1) Rajeev Ram (USA) & Joe Salisbury (Gbr) v (13) Juan Sebastian Cabal (Col) & Robert Farah (Col), (3) Marcelo Arevalo (Esa) & Jean-Julien Rojer (Ned) v (2) Wesley Koolhof (Ned) & Neal Skupski (Gbr), Catherine McNally (USA) & William Blumberg (USA) v (4) Storm Sanders (Aus) & John Peers (Aus), (10) Nicole Melichar (USA) & Ellen Perez (Aus) v (3) Barbora Krejcikova (Cze) & Katerina Siniakova (Cze)
How can I buy US Open tickets?
US Open tickets are currently on general sale and can be purchased on the official tournament website.
How much money does the winner receive?
Both the men’s and women’s singles champion will receive a cheque for $2,500,000 so just over £2.2 million.
Who are the defending champions?
Russian Daniil Medvedev beat Novak Djokovic in straight sets in last year’s men’s final, while Emma Raducanu secured the women’s title in fairytale fashion – but has not won a tournament since.
What are the latest odds?
Carlos Alcaraz 15/8
Casper Rudd 10/3
Karen Khachanov 6/1
Frances Tiafoe 10/1
Iga Swiatek 2/1
Caroline Garcia 9/2
Ons Jabeur 9/2
Aryna Sabalenka 9/1
Odds correct as of September 8