Venus Williams moved into the third round of the US Open by overcoming France’s Oceane Dodin 7-5 6-4.
The 37-year-old hit 33 winners in the first match of day three’s night session at Flushing Meadows.
The final match of the day saw fifth seed and two-time finalist Caroline Wozniacki suffer a shock 6-2 6-7 (5-7) 6-1 defeat by Ekaterina Makarova.
Wimbledon champion Garbine Muguruza eased past Ying-Ying Duan in straight sets 6-4 6-0.
Fourth seed Elina Svitolina saw off Katerina Siniakova 6-0 6-7 (5-7) 6-3 and next plays Evgeniya Rodina, who beat Eugenie Bouchard 7-6 (7-2) 6-1.
Sloane Stephens, a semi-finalist in Toronto and Cincinnati, defeated 11th seed Dominika Cibulkova 6-2 5-7 6-3.
Eighth seed Svetlana Kuznetsova,who won at Flushing Meadows in 2004, saved three match points to prevail against Marketa Vondrousova in an entertaining encounter on Grandstand Court.
The 18-year-old Vondrousova was left in tears as she lost the final-set tie-break after struggling with cramp.