The second seed sailed through the opening set but struggled to close out the contest, eventually coming through 6-0 7-6(3).
Number one seed Sabine Lisicki was forced to go the distance by Donna Vekic before the German triumphed 7-5 2-6 6-4 in two hours.
American Alison Riske relinquished just 14 points on serve as she destroyed Anabel Medina Garrigues 6-0 6-0 while Karolina Pliskova surprised seventh seed Bethanie Mattek-Sands with a 6-2 6-4 victory.
At the Paris Open, Anastasia Pavlyuchenkova and Klara Zakopalova moved into the second round with victories over Francesca Schiavone and Caroline Garcia respectively.
Pavlyuchenkova needed three sets to see off her Italian opponent 1-6 6-4 6-1 while Zakopalova enjoyed a smoother passage after a 7-6(4) 6-2 success.
Top seeds Maria Sharapova, Petra Kvitova, Sara Errani and Angelique Kerber all join the action in the second round after receiving byes.
Pattaya Open results
Karolina Pliskova (Czech Republic) beat 7-Bethanie Mattek-Sands (U.S.) 6-2 6-4
2-Svetlana Kuznetsova (Russia) beat Zhang Shuai (China) 6-0 7-6(3)
Andrea Hlavackova (Czech Republic) beat Estrella Cabeza Candela (Spain) 6-2 6-4
Alison Riske (U.S.) beat Anabel Medina Garrigues (Spain) 6-0 6-0
1-Sabine Lisicki (Germany) beat Donna Vekic (Croatia) 7-5 2-6 6-4
8-Peng Shuai (China) beat Patricia Mayr-Achleitner (Austria) 6-1 7-6(1)
Paris Open results
Anastasia Pavlyuchenkova (Russia) beat Francesca Schiavone (Italy) 1-6 6-4 6-1
Klara Zakopalova (Czech Republic) beat Caroline Garcia (France) 7-6(4) 6-2