Peng Shuai became the second seed in as many days to withdraw from the Malaysian Open, giving Magda Linette a walkover into the quarter-finals
Fourth seed Peng was trailing 5-2 when she retired from her second-round match against Linette in Kuala Lumpur due to a back injury a day after Elina Svitolina pulled out with a leg injury.
Bad weather has disrupted the schedule in Malaysia this week and the match was delayed by rain before a ball had even been served.
When they resumed, Peng was broken three times by the unseeded Pole before calling it a day.
Only three players were able to confirm their places in the last eight on Wednesday due to the adverse conditions, but the quarter-final line-up was finalised despite more suspensions on day four.
Fifth seed Duan Ying-Ying looked set to get past Sara Sorribes Tormo in rapid time after dominating the first set, but was made to work for a 6-0 4-6 7-5 victory.
Sorribes Tormo won only seven points in the first set and trailed 2-0 in the second, but showed great character to make a game of it before China's Duan edged her way through.
Qualifier Ashleigh Barty defeated Miyu Kato 6-0 6-3 after less than an hour on court in a one-sided contest which was delayed by lightning.
Chinese duo Wang Qiang and Han Xinyun also prevailed at the expense of Zheng Saisai and Anna Kalinskaya respectively.