11:41 CET - Roberto Carballes Baena (31) is into the Hangzhou quarter-finals after beating Mitchell Krueger (30) 3-6, 6-3, 6-4.
11:37 CET - Beatriz Haddad Maia (28) has won her second match of the day to move into the Seoul final, easing past Veronika Kudermetova (27) 6-4, 6-4.
09:57 CET - Diana Shnaider (20) is continuing her impressive form in Seoul, defeating Marta Kostyuk (22) 7-6(7), 6-3 to move into the semi-finals.
Elsewhere, Marin Cilic (35) is the first winner of the day in Hangzhou after a routine 6-4, 6-1 victory over Yoshihito Nishioka (28).
08:13 CET - Top seed Daria Kasatkina (27) is into the semi-finals in Seoul after her opponent Emma Raducanu (21) was forced to retire when trailing 1-6.
Joining Kasatkina in the final four in South Korea are Beatriz Haddad Maia (28) and Veronika Kudermetova (27).
07:50 CET - Good morning and welcome to our coverage of today's tennis action!
