Simona Halep is into the third round of the U.S. Open for the first time since 2016.
The No. 12 seed rolled to a 6-3, 6-1 victory over Kristina Kucova at Arthur Ashe Stadium, where their match was moved after Naomi Osaka's opponent withdrew from their scheduled match.
Halep has won two Grand Slam titles but struggled at the U.S. Open. She lost in the first round in consecutive appearances in 2017 and 2018 and hadn't gone past the second round since reaching the quarterfinals in 2016.
She completed her victory under the closed roof while play was suspended again on the outer courts after rain returned.
Earlier, Garbiñe Muguruza and Ons Jabeur had quick victories to reach the third round of the U.S. Open.
The ninth-seeded Muguruza, a two-time Grand Slam champion, beat Andrea Petkovic 6-4, 6-2. She could next face No. 18 seed Victoria Azarenka, who reached her third U.S. Open final last year.
The 20th-seeded Jabeur routed Maria Camila Osorio Serrano 6-0, 6-1 in 53 minutes.
Defending champion Naomi Osaka was the first player to reach the third round when opponent Olga Danilovic of Serbia withdrew for medical reasons.
