In the women's draw, top seed Iga Swiatek was beaten by home favourite Jessica Pegula, who'll take on Karolina Muchova in the semis tonight.
Jack Draper says he's yet to show his best at the US Open, despite reaching a first grand slam semi-final.
The British number one will take on top seed Jannik Sinner tomorrow, after beating Alex de Minaur.
He's yet to drop a set in New York.
In the women's draw, top seed Iga Swiatek was beaten by home favourite Jessica Pegula, who'll take on Karolina Muchova in the semis tonight.
Should Pegula win, it could be an all-American final - if Emma Navarro can beat Aryna Sabalenka.

Thursday Morning Sports Update
Littler Misses Today's Players Championship 33 Event Due To Traffic
Rory Best Set To Return To Ulster As The Province's New General Manager
Wednesday Morning Sports Update
Claims Ladies Senior Camogie Final Celebrated In Dark Refuted By Kildare LGFA And Kildare GAA
Kildare's Lauren Walsh Finished Third At The Wistron Ladies Open
Tuesday Morning Sports Update
The Girls In Green Are Training In Belgium Ahead Of Tomorrow's Nation League Game