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Kvitova through to semi-finals

Second seed Petra Kvitova booked her place in the semi-finals of the WTA Connecticut Open with a comfortable straight-sets win over Barbora Zahlavova-Strycova.

The reigning Wimbledon champion continued her preparations for the US Open with a 6-4 6-1 victory on Thursday.

Magdalena Rybarikova also progressed to the final four after beating Alison Riske 7-5 0-6 6-4 after weathering a comeback by the American in the second set.

Camila Giorgi will face Rybarikova after she defeated Garbine Muguruza 6-4 6-7 (7/4) 6-2.

Kvitova's next opponent will be Australian Sam Stosur. The former US Open winner took a three-set affair with Kirsten Flipkens 6-3 4-6 6-3.