Florianopolis, Brazil (Sports Network) - Top-seeded Venus Williams was an easystraight-set winner over Magadalena Rybarikova during Thursday's quarterfinalsat the inagural WTA Brasil Tennis Cup.

One day after being taken to the limit by Spanish teen Garbine Muguruza in athree-set thriller in the second round, the seven-time Grand Slam championWilliams had little problems disposing of the fifth-seeded Rybarikova in 6-4,6-0 fashion on the hardcourts at Federacao Catarinense de Tenis.

Williams' victory sets up a semifinal bout with Olga Puchkova on Friday afterthe unseeded Russian routed Slovakia's Jana Cepelova by a 6-1, 6-1 score injust 75 minutes.

Seventh-seeded French teenager Kristina Mladenovic also reached the semis byhandling Hungarian Melinda Czink 6-4, 6-3, while Romanian Monica Niculescurouted Hungary's Timea Babos 6-3, 6-2. The 19-year-old Mladenovic will battleNiculescu in Friday's other semifinal.