10:16 CET - Second seed Ann Li is closing in on the title in Guangzhou after the American battled through a fiercely competitive opening set to take it 7-6(6) over Lulu Sun.
Follow the second set with Flashscore here.
08:09 CET - We've already had our first winner of the day, with Belinda Bencic clinching the title in Tokyo after a dominant 6-2, 6-3 victory over Czech rising star Linda Noskova.
Bencic - who started the 2025 season ranked 421 after returning from maternity leave - picks up her 10th career title, and will rise to world number 11 as a result.
08:00 CET - Good morning and welcome to our coverage of today's finals in Vienna, Basel, Tokyo and Guangzhou!