NEW YORK, USA (AP) — Maria Sharapova’s serve and her groundstrokes were abandoning her. What she had was her conditioning.

The five-time major champion rallied from a set down to beat 95th-ranked Alexandra Dulgheru 4-6, 6-3, 6-2 in the second round of the US Open yesterday. Sharapova overcame nine double-faults and 46 unforced errors to improve her record in three-set matches this year to 17-6.

Dulgheru had played just twice since mid-July, and she was dragging as the match approached two hours late in the second set.

On a hot, windy day, fourth-seeded Agnieszka Radwanska and 21st-seeded Sloane Stephens lost earlier.

The 21-year-old Stephens stumbled to her earliest loss at the US Open, upset by 96th-ranked Johanna Larsson.

Down a set and a break, Larsson rallied to win 5-7, 6-4, 6-2 to match her best performance at a major tournament.

Second-seeded Simona Halep had no such trouble, routing Jana Cepelova 6-2, 6-1, while Peng Shuai, ranked 39th, beat Radwanska 6-3, 6-4.

On the men’s side, sixth-seeded Tomas Berdych swept 2001 US Open champ Lleyton Hewitt 6-3, 6-4, 6-3. Seventh-seeded Grigor Dimitrov beat American Ryan Harrison 6-2, 7-6 (4), 6-2.