Charleston - Defending champion Andrea Petkovic opened play at the Family Circle Cup with a 1-6, 6-1, 6-2 victory over Chanelle Scheepers on Tuesday.
Petkovic, seeded third, lost the opening set 6-1 before taking 12 of the next 15 games to advance. Others moving on were fifth-seeded Angelique Kerber, sixth-seeded Jelana Jankovic and eighth-seeded Caroline Garcia.
The top two seeds, Eugenie Bouchard and Ekaterina Makarova, start play at the clay-court tournament on Wednesday.
Petkovic was a surprise champion here a year ago. But it looked as if she would be a surprise early loser in defending the title. However, Petkovic turned things around to win her seventh straight match at the Family Circle Tennis Center.
Other winners on Tuesday were past champion, ninth-seeded Sam Stosur; 12th-seeded Belinda Bencic and last year's finalist Jana Cepelova.
Results from the second day of the WTA Charleston Open on Tuesday (x denotes seeding):
Lucie Hradecka (CZE) bt Kristina Kucova (SVK) 7-5, 6-3
Caroline Garcia (FRA x8) bt Sachia Vickery (USA) 6-3, 4-6, 6-3
Jelena Jankovic (SRB x6) bt Tatjana Malek (GER) 6-3, 6-7 (6/8), 6-1
Andrea Petkovic (GER x3) bt Chanelle Scheepers (RSA) 1-6, 6-1, 6-2
Angelique Kerber (GER x5) bt Evgeniya Rodina (RUS) 3-6, 6-3, 6-4
Sloane Stephens (USA) bt Bethanie Mattek-Sands (USA) 3-6, 6-3, 6-2
Andreea Mitu (ROM) bt Varvara Lepchenko (USA x10) 6-2, 2-1 - retired
Jana Cepelova (SVK) bt Elena Vesnina (RUS) 6-2, 6-7 (5/7), 7-6 (7/4)
Sara Sorribes (ESP) bt Anastasia Pavlyuchenkova (RUS x14) 6-4, 3-0 - retired
Belinda Bencic (SUI x12) bt Casey Dellacqua (AUS) 6-1, 6-2
Madison Brengle (USA) bt Edina Gallovits (ROM) 6-7 (2/7), 6-4, 6-2
Lara Arruabarrena (ESP) bt agla Buyukakcay (TUR) 6-2, 6-2
Samantha Stosur (AUS x9) bt Sesil Karatantcheva (BUL) 6-2, 6-4