Results from WTA Charleston tournament in South Carolina on Thursday (x denotes seed): 2nd rd Ons Jabeur (TUN x1) bt Alycia Parks (USA) 6-4, 6-0 Astra Sharma (AUS) bt Madison Brengle (USA x8) 6-4, 4-6, 7-5 Linda Fruhvirtova (CZE) bt Emma Navarro (USA) 6-4, 6-2 Maria Camila Osorio (COL) bt Christina McHale (USA) 2-6, 7-6 (7/2), 7-6 (7/1) afp