Here is the order of play on the main showcourts on the first day of the U.S. Open (prefix number denotes seeding):

ARTHUR ASHE STADIUM (1600 GMT/12 PM ET)

13-Ben Shelton (U.S.) v Dominic Thiem (Austria)

Varvara Gracheva (France) v 3-Coco Gauff (U.S.)

Clara Burel (France) v Sloane Stephens (U.S.)

Radu Albot (Moldova) v 2-Novak Djokovic (Serbia)

LOUIS ARMSTRONG STADIUM (1500 GMT/11 AM ET)

7-Zheng Qinwen (China) v Amanda Anisimova (U.S.)

Camilo Ugo Carabelli (Argentina) v 12-Taylor Fritz (U.S.)

14-Madison Keys (U.S.) v Katerina Siniakova (Czech Republic)

Aleksandar Kovacevic (U.S.) v 20-Frances Tiafoe (U.S.)

Priscilla Hon (Australia) v 2-Aryna Sabalenka (Belarus)