Kvitova, Sakkari, Swiatek, Kontaveit all in Ostrava Open semis

Top-seeded Iga Swiatek of Poland advanced to the semifinals of the Ostrava Open after beating seventh-seeded Elena Rybakina of Kazakhstan.

This happens to be her first semifinals since winning in Rome in May to set up a match against fourth-seeded Maria Sakkari.

The Greek overcame Czech Tereza Martincova 7-5, 6-3 in the quarterfinals. Sakkari will be playing in her sixth semifinal of the season.

Also, second-seeded Petra Kvitova of the Czech Republic eliminated Jil Teichmann of Switzerland in straight sets – 6-4, 6-4 – hitting 24 winners.

In the last quarterfinal, Anett Kontaveit of Estonia upset third-seeded Belinda Bencic 6-4, 6-3. Kontaveit next plays two-time Wimbledon champion Kvitova.