22:50 CET - In the final match of the day, American Marcos Giron (31) crushed Zizou Bergs (25) 6-2, 6-2 to secure his place in the Antwerp last four.
And that will be all from the Tennis Tracker today! Make sure you tune in tomorrow morning for semi-finals day, as well as some mega action from Saudi Arabia!
22:10 CET - 2013 winner Grigor Dimitrov (33) has made lightwork of Dominic Stricker (22), beating the Swiss player 6-3, 6-2 to move into the Stockholm semi-finals. With just a few weeks left until the ATP Finals in Turin, can Dimitrov make a late charge to secure a place in the world's top eight?
21:10 CET - Stefanos Tsitsipas (26) continues to struggle and take backward steps, falling to a straightforward 4-6, 4-6 defeat to Jiri Lehecka (22) in Antwerp. A two-time Grand Slam finalist, the Greek is a shadow of the player he once was. A potentially fatal blow to his chances of qualifying for the ATP Finals.
20:42 CET - Casper Ruud's (25) dismal run of form has continued with a disappointing 5-7, 6-7(5) loss to Tallon Griekspoor (28) in Stockholm. The defeat means Ruud has won just two of his last eight matches.
19:28 CET - Top seed Alex De Minaur (25) has been knocked out in Antwerp, losing 6-3, 3-6, 7-5 to world number 77 Hugo Gaston (24), who hit a stunning shot on his way to victory.
18:15 CET - Karolina Muchova (28) has been resurgent in recent months since returning from wrist surgery, reaching the US Open semi-final and Beijing final. Now as she eyes her first WTA title since 2019, she has moved into the semi-finals in Ningbo, outlasting Anna Kalinskaya (25) 2-6, 6-2, 6-3 in tough, humid conditions with the clock ticking past midnight.
17:38 CET - Third seed Karen Khachanov (28) has completed the semi-final lineup in Almaty with a 6-2, 6-4 win over Beibit Zhukayev (24).
16:55 CET - Another veteran has pulled off an upset! In Antwerp, Roberto Bautista-Agut (36) has won 3-6, 6-2, 7-6 against third seed Felix Auger-Aliassime (24).
16:05 CET - What a week Stan Wawrinka (39) is having! The three-time Grand Slam champion has beaten top seed Andrey Rublev (26) 7-6, 7-6 to move into his first semi-final in over a year in Stockholm.
14:45 CET - Former world No. 2 Paula Badosa (26) has had a fabulous second half of 2024, and her great form shows no sign of letting up. The Spaniard coasted past No. 6 seed Beatriz Haddad Maia (28) 6-3, 6-2 to move into the semi-finals in Ningbo and set up a meeting with Russia's Daria Kasatkina (27).
13:55 CET - There's been another upset in Almaty with top seed Frances Tiafoe (26) losing 6-2, 7-6 to Aleksandar Vukic (28), who saved two set points in a thrilling final tiebreak.
In Stockholm, fourth seed Tommy Paul (27) has beaten Miomir Kecmanovic (25) 7-6, 6-2 to progress to the semi-finals.
12:47 CET - Mirra Andreeva (17) is through to the semi-finals in Ningbo with fourth seed Barbora Krejcikova (28) retiring with an injury while trailing 7-6, 3-2.
12:03 CET - Francisco Cerundolo (26) has eased past home favourite Alexander Shevchenko (23) in Almaty, winning 6-2, 6-3 in just over an hour.
Over in Osaka, Diane Parry (22) secured a hard-fought 6-3, 1-6, 6-3 win against Clara Tauson (21).
10:50 CET - The first quarter-final has been won by Daria Kasatkina (27) with the fifth seed beating Yulia Putintseva (29) 6-4, 1-6, 7-6, saving two match points in the process.
In Almaty meanwhile, second seed Alejandro Tabilo (27) has lost 3-6, 6-3, 6-4 to Gabriel Diallo (23) of Canada.
10:07 CET - Two of the quarter-finals have already been completed in Osaka with Suzan Lamens (25) and Aoi Ito (20) both securing a spot in the final four.
You can follow the two remaining matches of the day here.
10:00 CET - Hello and welcome to Flashscore's coverage of today's tennis!
Some big news broke overnight, with world number nine Danielle Collins (30) announcing that she's calling off her plans to retire and will play on in 2025.