Defending champion Iga Swiatek cruised past China's Zheng Qinwen in straight sets to reach the Indian Wells semi-finals.
Zheng beat Swiatek on the way to winning gold at last year's Paris Olympics - but was no match for the Pole in their first meeting since.
The world number two claimed the first set 6-3 and eased into a 5-1 lead in the second before bad weather led to play being suspended.
Zheng, 22, improved after the delay and won two straight games before Swiatek closed out the match 6-3 6-3.
"It was a weird match with all the breaks and everything, but I wanted to be composed and really focused and I'm glad that I did that," Swiatek said.