21:58 CET - Casper Ruud (24) has been knocked out in Geneva after losing Nicolas Jarry (27) in three sets 3-6, 7-6, 7-5.
20:59 CET - Here are our ATP and WTA Flashmoments of the day.
20:52 CET - Sloane Stephens (30) has battled past compatriot Peyton Stearns (21) in three sets 7-6, 3-6, 7-6.
19:55 CET - In the last of the quarter-finals in Strasbourg, Clara Burel (22) has pulled off an upset on home turf, beating fourth seed Bernarda Pera (28) 6-2, 3-6, 6-4.
19:07 CET - Alexander Zverev (26) has advanced in Geneva without breaking a sweat, with opponent Yibing Wu (23) being forced to retire when 4-1 down in the first set.
18:24 CET - Lyon favourite Felix Auger-Aliassime (22) has withdrawn from the tournament with an injury, meaning Frenchman Arthur Fils (18) has advanced to the semi-finals.
There, he'll face Brandon Nakashima (21), who has won an all-American clash with Tommy Paul (26) 6-3, 7-6.
17:43 CET - The third quarter-final in Strasbourg has been won by Elina Svitolina (28), who has beaten Varvara Gracheva (22) 6-3, 6-4.
In Rabat, Lucia Bronzetti (24) has knocked out fourth seed Alycia Parks (22), 6-2, 6-0.
17:05 CET - Grigor Dimitrov (32) has made it through to the Geneva semi-finals having beaten Chris O'Connell (28) in a clash that lasted almost three hours, winning 6-7, 7-5, 6-4.
Next up for the Bulgarian is Taylor Fritz.
16:35 CET - In something of an upset, world number 195 Julia Riera (20) has beaten two-time French Open quarter-finalist Yulia Putintseva (28) in Rabat, winning 5-7, 6-4, 6-2.
In Strasbourg meanwhile, seventh seed Lauren Davis (29) has beaten Anastasia Pavlyuchenkova (31) 1-6, 7-6, 6-0.
15:55 CET - The second clash of the day between a Brit and an Argentine in Lyon has gone the opposite way of the first with Cameron Norrie (27) beating Sebastian Baez (22) 6-2, 2-6, 6-1.
14:02 CET - Francisco Cerundolo (24) has beaten Jack Draper (21) 4-6, 6-4, 6-3 in Lyon, while Taylor Fritz (25) has won 6-1, 6-2 against Ilya Ivashka (29) in Geneva.
12:55 CET - The first quarter-finals of the day have finished in the WTA tournaments in Strasbourg and Rabat.
In Morocco, Julia Grabher (26) has advanced with opponent and top seed Martina Trevisan (29) retiring with an injury when a set down, and Anna Blinkova (24) has beaten Emma Navarro (22) 6-4, 6-4 in France.
12:48 CET - For the second time this year, former world number two Paula Badosa (25) is going to miss a Grand Slam through injury, with a spinal fracture ruling her out of the French Open.
08:50 CET - One man not in action today is Mikael Ymer (24). The Swede was disqualified in his match against Arthur Fils (18) in Lyon yesterday for smashing his racket against the umpire's chair.
07:30 CET - Hello and welcome to today's Tennis Tracker, which will keep you up to date with how the likes of Alexander Zverev (26), Taylor Fritz (25), Felix Auger-Aliassime (22) and Martina Trevisan (29) get on in their quarter-finals.