NEW YORK — The 2026 US Open moved into its second week on Monday, with world number one Aryna Sabalenka and men's top seed Carlos Alcaraz scheduled on Arthur Ashe Stadium as the fourth round unfolded at Flushing Meadows.

Sabalenka, the defending women's champion, entered the round of 16 as the tournament favourite after reaching the second week without dropping a set. The United States Tennis Association confirmed her match among the featured evening sessions on the main show court.

Alcaraz carried strong form into the round of 16 following his run through the opening week. The draw set up potential quarter-final collisions among the top seeds, with Jannik Sinner also advancing on the opposite half of the bracket.

Robust attendance across the grounds accompanied the singles fields narrowing to the final 16 in each draw. Monday's schedule placed the highest-ranked survivors on Ashe and Louis Armstrong Stadium, ensuring high-profile clashes with quarter-final berths at stake.

The US Open, the last major of the season, continues through the men's and women's finals in the second week of September at the Billie Jean King National Tennis Center in Queens.