12:35 CET - There's been a shock in Chengdu, with Chinese wildcard Yi Zhou coming from a set down to dump out fifth seed Cameron Norrie 6-7(3), 6-4, 7-6(2) in two hours and 47 minutes.
11:41 CET - Fifth seed Diana Shnaider has booked her spot in the next round in Seoul after recovering from a slow start to defeat Caty McNally in three sets, 2-6, 6-2, 6-4.
Sorana Cirstea is also through, with the Romanian easing past Anastasia Zakharova 6-3, 6-1.
10:18 CET - Marcos Giron is through to the second round in Chengdu after a hard-fought 7-5, 6-4 victory over compatriot Ethan Quinn.
07:30 CET - Good morning and welcome back to the Tennis Tracker this Wednesday morning!
There is so much to look forward to today, with the second Billie Jean King Cup quarter-final due to begin at 11:00 CET, as Paula Badosa's Spain takes on a Ukraine side led by Elina Svitolina and Marta Kostyuk. It should be a cracking tie.
Meanwhile, on the WTA Tour, there is a jam-packed schedule in Seoul, with Emma Raducanu, Maya Joint, Eva Lys, Sofia Kenin and Beatriz Haddad Maia all in action. Diana Shnaider and Sorana Cirstea began their opening matches this morning, but heavy rain has temporarily suspended play.
There are also ATP tournaments getting underway in Chengdu and Hangzhou, with names like Cameron Norrie, Adrian Mannarino, and Learner Tien set to take to the court.