(Dothan)-- Only two singles matches on Thursday did not feature an American-born player at Westgate Tennis Center.

China's Shuai Zhang defeated Arina Rodionova in straight sets: 6-1, 6-1. And Germany's Tatjana Malek downed Spain's Laura Pous-Tio in straight sets as well: 6-3, 6-3.

Five Americans advanced to the Friday's Quarterfinals including Alison Riske. Riske battled through a three and a half hour match with fellow American Julia Cohen.

Here's a complete list of Thursday's results from the Dothan Pro Classic:

WS Ajla TOMLJANOVIC (CRO) DEF Allie KIICK (USA) 7-6(0) 6-0

WS Shuai ZHANG (CHN) [8] DEF Arina RODIONOVA (RUS) 6-1 6-1

WS Jessica PEGULA (USA) [7] DEF Madison BRENGLE (USA) 1-6 6-3 6-2

WS Shelby ROGERS (USA) DEF Belinda BENCIC (SUI) 6-4 3-6 6-0

WS Irina FALCONI (USA) DEF Maria SANCHEZ (USA) [3] 1-6 6-3 7-5

WS Alexa GLATCH (USA) [4] DEF Mariana DUQUE-MARINO (COL) 4-6 6-3 6-4

WS Alison RISKE (USA) DEF Julia COHEN (USA) [5] 6-4 5-7 6-4

WS Tatjana MALEK (GER) [2] DEF Laura POUS-TIO (ESP) 6-3 6-3

WD Irina FALCONI (USA) / Maria SANCHEZ (USA) [1] DEF Emily J. HARMAN (USA) / Jessica PEGULA (USA) 7-6(4) 2-6 [10-7]

WD Maria-Fernanda ALVES (BRA) / Mariana DUQUE-MARINO DEF Irena PAVLOVIC (FRA) / Arina RODIONOVA (RUS) 7-5 0-6 [10-7]

WD Shelby ROGERS (USA) / Ajla TOMLJANOVIC (CRO) DEF Madison BRENGLE (USA) / Alexa GLATCH (USA) 7-5 6-7(4) [13-11]

WD Julia COHEN (USA) [2] / Tatjana MALEK (GER) DEF Noelle HICKEY (USA) / Kady POOLER (USA) 3-6 6-2 [10-5]