Top seed Karolina Pliskova started Friday in the last-16 at the inaugural Zhengzhou Open and ended the day in the semi-finals after defeating Polona Hercog and Sofia Kenin in succession.
Pliskova's match against Slovenian Hercog was suspended on Wednesday due to rain with the score at 6-3 2-5 and she only returned to court two days later after rain washed out Thursday's matches.
The Czech claimed five games in a row to see off Hercog 6-3 7-5 and carried that form into her quarter-final clash with sixth-seeded American Kenin, winning 6-4 4-6 6-1.
Pliskova now meets Ajla Tomljanovic after the Australian beat home favourite Zheng Saisai 6-1 6-7(4) 6-4.
"To play two matches in a day, it's never easy," Pliskova said. "But in the first one, I was lucky enough to not go to a third set, just finished quickly and saved some power for the next one.