(AP) Ana Ivanovic started her quest for a third Generali Ladies title by defeating Yanina Wickmayer of Belgium 6-2, 6-4 in the first round on Tuesday.
The third-ranked Ivanovic, who won the event in 2008 and '10, served five aces and broke Wickmayer, also a former winner in 2009, five times.
"The result looked easier than it really was," Ivanovic said. "She made me work hard, especially in the second set."
Ivanovic next plays another former French Open champion, Francesca Schiavone.
Earlier, Camila Giorgi upset last year's finalist Julia Goerges 6-2, 6-3.
The 105th-ranked Giorgi, who won three qualifying matches to reach the main draw, avoided break points and converted the second match point on her serve.
"It was a good match," said the Italian, who broke Goerges three times. "I feel well on these hardcourts and I will try to keep going."
In the second round, Giorgi faces fifth-seeded Kirsten Flipkens, who rallied to beat 17-year-old Donna Vekic 2-6, 6-2, 6-2.
Also, seeded players Carla Suarez Navarro and Dominika Cibulkova reached the second round. No. 4 Suarez Navarro defeated Kristyna Pliskova 6-2, 6-3, and No. 7 Cibulkova came from behind to beat Annika Beck 3-6, 6-2, 6-1.
Cibulkova next plays Katarzyna Piter, who defeated Irina-Camelia Begu 6-2, 4-6, 6-3.
Andrea Petkovic led 5-2 in the second set against Yvonne Meusburger but was broken twice while serving for the match before wrapping up a 6-3, 7-5 victory.