06:00 CET - After Alexandrova and Bouzkova went back on the court to warm up before resuming play, the match re-entered its delay due to rain.
05:10 CET - Play between Ekaterina Alexandrova and Marie Bouzkova will remain suspended for another 45 minutes to an hour due to rain in Monterrey.
04:10 CET - The matchup between Ekaterina Alexandrova and Marie Bouzkova is currently suspended in the first set due to rain.
03:50 CET - Ann Li takes down Xinyu Wang 6-3, 5-7, 6-4 after almost two-and-a-half hours in Cleveland.
03:00 CET - Meanwhile, in Monterrey, Diana Shnaider holds on to defeat Alycia Parks 6-3, 7-6 to advance to the final.
02:45 CET - Over in Winston-Salem, Botic Van De Zandschulp upsets world No. 29 Giovanni Mpetshi Perricard in straight sets 6-4, 7-5.
01:00 CET - Sorana Cirstea defeats Anastasia Zakharova in straight sets 6-1, 7-5 to advance in Cleveland. She continues her dominant run after previously upsetting top-seeded Liudmila Samsonova.
22:21 CET - Botic van de Zandschulp has moved into the Winston-Salem semi-finals, beating Yunchaokete Bu 6-3, 5-7, 6-3 in a real battle, one that lasted for just over two and a half hours.
The Dutchman will next face Giovanni Mpetshi Perricard for a place in the final.
21:51 CET - In some really unfortunate news, Sebastian Korda has pulled out of tonight's semi with illness, meaning Marton Fucsovics advances to the final.
20:00 CET - Good evening and welcome to our coverage of today's tennis!
Play gets underway in a couple of hours in Winston-Salem, with home favourite Sebastian Korda taking on Hungary's Marton Fucsovics in the first semi-final at 22:00 CET.
Ninth seed Giovanni Mpetshi Perricard awaits either Botic van de Zandschulp or Yunchaokete Bu in the other last-four tie, while in Cleveland, second seed Xinyu Wang will be targeting a spot in tomorrow's final.
Elsewhere, there are a couple of intriguing semi-finals in Monterrey, as Diana Shnaider takes on Alycia Parks at 01:00 CET and Ekaterina Alexandrova comes up against Marie Bouzkova.
Follow all the action in Monterrey, Cleveland and Winston-Salem via the links.