Thursday afternoon will see Hingis in action in a second-round match against the winner of the final first-round contest between India's Sania Mirza and home-grown favorite Lee Ye-ra.
Seventh-seeded Anna-Lena Groenefeld and No. 8-seeded Mary Pierce were knocked out in the opening round of the Fortis Championships on Tuesday.
Italian qualifier Karin Knapp defeated Groenefeld 6-0, 6-4; and Ukraine's Alona Bondarenko beat Pierce 6-3, 6-3.
On a great day for Italians, fifth-seeded Francesca Schiavone and Roberta Vinci joined Knapp in the second round.
The 14th-ranked Schiavone, the star of the Fed Cup team which won the final against Belgium, beat Michaella Krajicek of the Netherlands 6-4, 6-3. Vinci defeated Tatjana Malek of Germany 6-4, 6-3.
Nathalie Dechy beat Sybille Bammer 6-1, 3-6, 6-3, while Chanda Rubin won her first match in more than a year. The 342nd-ranked Rubin beat the 37th-ranked Martina Muller of Germany 6-3, 6-0.
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