Top seed Alize Cornet failed to overcome an overnight deficit to Jennifer Brady in round one of the Guangzhou Open.
Brady was leading 6-0 2-1 against the Frenchwoman before poor weather brought an early end to proceedings on Monday.
However, the reprieve failed to boost Cornet, who slipped to a 6-0 6-3 defeat when play resumed.
Aleksandra Krunic (4) had no such trouble, though. The 2017 finalist overcame Viktorija Golubic 6-4 6-3 in 95 minutes, while Zheng Saisai (8) was too good for Guo Hanyu in a 6-4 6-2 triumph and Wang Qiang (3) hammered Nicole Gibbs 6-1 6-2.
Wildcard Svetlana Kuznetsova needed to come from behind to defeat Karman Thandi in three sets, but Viktoria Kuzmova, Christina McHale, Wang Yafan and Kateryna Kozlova all came through in straight sets.
At the Korea Open, Agnieszka Radwanska began her tournament with a 6-4 7-5 defeat of Bethanie Mattek-Sands.
Alison Van Uytvanck (5) was sent packing in three sets by Ajla Tomljanovic and Magdalena Rybarikova (4) was forced to retire through injury when 6-3 3-2 down to Mandy Minella, but fellow seeds Hsieh Su-wei and Irina-Camelia Begu went through.
