Friday, August 22nd
09:10 CET - A few more results to round up from the overnight action, starting in Monterrey where second seed Ekaterina Alexandrova battled past Linda Noskova 7-6(5), 4-6, 6-2 and Marie Bouzkova defeated Antonia Ruzic 6-3, 6-2.
Meanwhile, in Cleveland, Xinyu Wang is through to the semi-finals after recovering from a set down to outlast Vikorija Golubic 4-6, 6-4, 6-4.
04:00 CET - Alycia Parks is through in Monterrey as she battles past Rebecca Sramkova 6-2, 7-5. She is into the semi-finals as she chases her second WTA title.
02:55 CET - Sorana Cirstea is into the final four in Cleveland after she beats top seeded Liudmila Samsonova 6-4, 6-1 in an hour and 23 minutes.
02:20 CET - After a difficult first set, Giovanni Mpetshi Perricard gets past Hamad Medjedovic 7-6 (8), 6-2 to make the semi-finals in Winston-Salem.
02:10 CET - Diana Shnaider pulls off a gutsy win against Elise Mertens 3-6, 7-6 (7), 7-6 (4) in a three-hour long quarter-final in Monterrey.
00:50 CET - Viktorija Golubic claims an impressive win in Cleveland as she defeats Katie Boulter 7-6 (8), 1-6, 6-4 to make the quarter-finals.
Thursday, August 21st
23:52 CET - Hungarian veteran Martin Fucsovics has moved into the final four in Winston-Salem after beating Jaume Munar 7-5, 6-3.
23:14 CET - An all-American clash in Cleveland has been won by Ann Li, who has claimed a hard-fought 6-3, 2-6, 6-3 win over Iva Jovic after just under two and a half hours of on-court action.
22:57 CET - World number 98 Elsa Jacquemot has continued her surprise run in Cleveland, moving into the last eight with a 7-5, 7-6 win over Solana Sierra.
22:11 CET - We finally have a result from Cleveland! After multiple rain delays spanning two days, second seed Xinyu Wang has beaten Australia's Talia Gibson 1-6, 6-2, 6-3.
21:28 CET - We have our first result of the evening, and it's a win for Sebastian Korda in Winston-Salem, with the 11th seed moving into the semi-finals with a 6-1, 6-4 win over Miomir Kecmanovic.
18:37 CET - We're still waiting for today's action to get underway in Cleveland, where rain is currently delaying play. Stay tuned for further updates!
17:03 CET - Play is now due to get started in Cleveland, with several interrupted matches from yesterday's schedule to be completed.
Follow Xinyu Wang vs Talia Gibson and the rest of the action right here.
15:00 CET - Good afternoon and welcome to our live coverage of today's tennis!
Play gets underway in just over a couple of hours in Cleveland, with Katie Boulter taking on Viktorija Golubic, while Xinyu Wang and Liudmila Samsonova also continue their campaigns.
Elsewhere, the standout quarter-final of the day comes in Monterrey, where third seed Diana Shnaider faces Elise Mertens at 23:00 CET.
Meanwhile, in Winston-Salem, Sebastian Korda, Jaume Munar and Giovanni Mpetshi Perricard all target a semi-final spot.
Check out the full schedules in Monterrey, Cleveland and Winston-Salem via the links.