Fresh legs meet proven major stamina in an open fourth-round slate, with Blockx, Tien and Gea testing established hard-court authority in New York.

Keys faces Zheng’s resurgent power, Rybakina meets a recent conqueror, and close friends Jovic and Eala take their rivalry onto the US Open night stage.

Alcaraz tests his wrist, Bublik meets Paul in a rematch, and Shelton faces Shapovalov in a volatile left-handed third-round bill under pressure in New York.

Cori Gauff faces a troublesome matchup, Naomi Osaka manages pressure, while Qinwen Zheng and Elena Rybakina carry sharp fitness questions into round two.

Monfils faces a younger problem-solver, Zverev must recover from five hours on court, and Auger-Aliassime meets Khachanov in a severe second-round test.

Shelton meets Hurkacz in a first-strike test, Navone faces the comedown after beating Djokovic, and Alcaraz puts his recovering wrist through another examination.

Rybakina tests an injured ankle, Badosa returns without hard-court preparation, and Korneeva challenges Keys in New York’s final first-round wave.

Jodar tests Kokkinakis’s body, Fery challenges Musetti’s rhythm, and Monfils begins his final US Open on his 40th birthday.

Alcaraz tests a repaired wrist, Fils brings Cincinnati heat to Tsitsipas, and Wawrinka begins his final major against a familiar opponent.

Qinwen Zheng’s repaired elbow meets a fearless qualifier, while Karolina Muchova, Aryna Sabalenka and Sloane Stephens face revealing first-round tests.