09:38 CET - Fifth seed Elina Avanesyan (22) has progressed in Osaka, with the Armenian beating Ashlyn Krueger (20) in straight sets, 7-6(1), 6-3.
Meanwhile, in Ningbo, Katerina Siniakova (28) is safely through after a relatively comfortable 6-2, 6-4 triumph over Magda Linette (32).
08:42 CET - Fourth seed Marie Bouzkova (26) has battled through in Osaka, seeing off Moyuka Uchijima (23) 7-6(6), 2-6, 6-3. There have also been victories for qualifier Ana Bogdan (31) and the seventh-seeded Diane Parry (22).
07:30 CET - Good morning and welcome back to the Tennis Tracker!
There have already been some results from Osaka, Japan, with Bianca Andreescu (24) falling to a disappointing 3-6, 0-6 defeat to Belgium's Greet Minnen (27), while Eva Lys (22) and Harriet Dart (28) have booked their spots in the next round.
There is plenty more action to come throughout the day, as Katie Boulter (28), Anna Kalinskaya (25) and Karolina Muchova (28) are all set to step foot on court in Ningbo.
Jiri Lehecka (22) will also be playing in Antwerp, while Cameron Norrie (29) returns to tennis after a two-month injury break in Stockholm.