The 16-year-old Pliskova, who beat Alicia Molik 6-4, 6-4 Tuesday for her first victory on the WTA tour, will now play third-seeded Victoria Azarenka or Tatiana Poutchek, both of Belarus.
Azarenka beat Petra Kvitova 6-3, 6-4 in a first-round match suspended from Tuesday due to rain.
Also in the second round, Roberta Vinci of Italy defeated Jill Craybas of the United States 6-4, 6-4.
In the first round, second-seeded Shahar Peer of Israel edged Anna Lapushchenkova of Russia 7-5, 7-5 and will next meet Tsvetana Pironkova of Bulgaria.
Vera Dushevina of Russia knocked out Martina Muller of Germany, 6-0, 6-2, and Iveta Benesova of the Czech Republic defeated Sofia Arvidsson of Sweden 6-3, 5-7, 6-2.
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