Hungarian qualifier Dalma Galfi reached the last 8 of the Thailand Open by edging out Chinese Xiyu Wang, the No 5 seed, 6-4, 3-6, 7-5 at the True Arena Hua Hin.
Galfi, ranked No 137, will play the winner of the match between Russian Diana Shnaider and Spaniard Paula Badosa next.
Ahead of her victory, the Hungarian beat Australian wildcard Ajla Tomljanovic (6-3, 6-0).
Wang, ranked No 63, won against Qiang Wang (6-1, 6-1) in the previous round of the Hua Hin tournament.
Hua Hin WTA 250, other second-round results (True Arena Hua Hin, hard, USD 267.082, most recent results first):
- Linda Fruhvirtova vs. Lin Zhu
- Arina Rodionova vs. Zhuoxuan Bai
- Katie Volynets vs. Tatjana Maria
- Anna Karolina Schmiedlova vs. Yafan Wang
- Viktorija Golubic vs. Yulia Putintseva
- Xinyu Wang vs. Nao Hibino
- Diana Shnaider vs. Paula Badosa