Results of matches played in the Brisbane International at the Queensland Tennis Centre on Saturday (x denotes seed): Semi-finals Singles Madison Keys (USA x8) bt Petra Kvitova (CZE x6) 3-6, 6-2, 6-3 Karolina Pliskova (CZE x2) bt Naomi Osaka (JPN x3) 6-7 (10/12), 7-6 (7/3), 6-2 Doubles Hsieh Su-Wei (TPE)/Barbora Strycova (CZE x1) bt Lyudmyla Kichenok (UKR)/Yang Zhaoxuan (CHN) 7-6 (7/3), 6-3 afp