23:58 CET - Our moment of the day was a brilliant rally played out in the overnight match between veterans Novak Djokovic (36) and Gael Monfils (36). Djokovic closed it out with a killer shot!
Don't forget to tune in to the Tennis Tracker again tomorrow morning as we will have updates from all the games happening tonight, including Djokovic’s quarter-final meeting with Taylor Fritz (25).
23:22 CET - Top seed Carlos Alcaraz (20) has defeated Max Purcell (25) of Australia to claim a spot in the semi-finals in Cincinnati but it wasn’t all plain sailing for the Spaniard.
After dropping the first set, he recovered to win 4-6, 6-3, 6-4.
22:20 CET - Coco Gauff (19) will face Iga Swiatek (22) in the semi-finals in Cincinnati after beating Jasmine Paolini (27) 6-3, 6-2 in their quarter-final.
20:40 CET - Hubert Hurkacz (26) is through to the men’s semis in Cincinnati after defeating Alexei Popyrin (24) 6-1, 7-6(8).
20:00 CET - Karolina Muchova (26) is through to the semi-final in Cincinnati after fellow Czech Marie Bouzkova (25) retired from their quarter-final with the score at 3-0 in the first set.
18:45 - Iga Swiatek (22) is into the Cincinnati semis! After a tight first set, the world number one upped her game to beat Marketa Vondrousova (24) 7-6, 6-1.
17:24 CET - The first match of the day, between Iga Swiatek (22) and Marketa Vondrousova (24) is underway in Cincinnati.
09:54 CET - Due to rain delays and starting times that were late to begin with, plenty of matches have gone into the early hours of the morning in North American tournaments in the last few weeks, but there are no plans to tweak schedules to ensure such late finishes don't take place at the US Open.
08:26 CET - With rain falling throughout, play ran late last night, but the delays didn't stop favourites Novak Djokovic (36) and Carlos Alcaraz (20) from making it through to the next round.
Read all about their matches and more of yesterday's action here
06:25 CET - Hello and welcome to our coverage of today's tennis. Carlos Alcaraz (20) plays Max Purcell (25) this evening, and before that is a mouthwatering clash between world number one Iga Swiatek (22) and Wimbledon champion Marketa Vondrousova (24).