A number of the top men and women are in action today.
Fourth seed Alexander Zverev is among those in action at the US Open later.
His round four clash with Jannik Sinner of Italy is scheduled to get underway at 5pm Irish time.
Elsewhere this evening, sixth seed Matteo Berrettini takes on Oscar Otte, while Reilly Opelka meets Lloyd Harris.
6-3, 4-0 ➡️ 6-3, 4-5@GarbiMuguruza is not going down without a fight. 😤 pic.twitter.com/ybXIAzJrnH
— US Open Tennis (@usopen) September 6, 2021
In the women's singles, seventh seed Iga Swiatek goes up against Belinda Bencic of Switzerland.
Shelby Rogers of the USA goes up against England's Emma Raducanu.
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