23:35 CET - Today's action is over, but there's plenty more where that came from tomorrow, with the likes of Carlos Alcaraz (19), Iga Swiatek (21) and Andrey Rublev (25) all taking to the courts across Europe.
Join us then!
23:21 CET - The WTA Flash Moment comes courtesy of Jule Niemeier (23), who stayed in a point against Elena Rybakina (25) by hitting a tweener before winning it a shot later with a sumptuous backhand.
23:08 CET - Our Flash Moment of the day from the men's side was Pedro Cachin's (28) incredible through-the-legs shot in his match against Stefanos Tsitsipas (24) earlier in Barcelona
22:40 CET - Ons Jabeur (28) came back from a torrid first set to defeat Jelena Ostapenko (25) 1-6, 7-5, 6-3 in Stuttgart. She joins Aryna Sabalenka (24) in the quarter-final stage.
20:13 CET - Jiri Lehecka (21) made a strong start to his clay court season, beating Grigor Dimitrov to reach the third round in Monte Carlo, and he's followed that up by beating Gael Monfils (36) in Banja Luka, 6-4, 6-3.
In Stuttgart meanwhile, world number two Aryna Sabalenka (24) has beaten Barbora Krejcikova (27) 6-3, 6-3.
18:47 CET - Indian Wells champion Elena Rybakina (25) is through in Stuttgart after beating Jule Niemeier (23) 7-5 6-3. She will be looking to make an impact on the clay courts after such a wonderful start to 2023.
18:33 CET - Novak Djokovic (35) is struggling with an injury at the moment, and that was evident in his opening match at Banja Luka. Despite losing the first set to Luca van Assche (18) though, the world number one advanced, winning 6-7, 6-3, 6-2.
17:30 CET - Stefanos Tsitsipas (24) had no issues getting past Pedro Cachin (28) in Barcelona, with the second seed winning 6-4, 6-2.
16:22 CET - Coco Gauff (19), the fifth seed in Stuttgart, has come through a tough test to reach the next round, beating world number 13 Veronika Kudermetova (25) 6-2, 4-6, 7-6.
15:25 CET - Cameron Norrie (27) is also through in Spain after destroying Pavel Kotov (24) 6-1 6-2.
14:49 CET - There have been a number of other winners in Barcelona so far today. Grigor Dimitrov (31), Denis Shapovalov (24) and Yoshihito Nishioka (27) all won comfortably in straight sets, while Alex de Minaur (24) utterly dismantled Alexander Shevchenko (22) 6-0 6-1.
14:25 CET - Jannik Sinner (21) has eased through in Barcelona, defeating Diego Schwartzman (30) 6-2 6-4.
13:23 CET - Karolina Pliskova (31) has surged into the second round in Stuttgart after beating world number nine Maria Sakkari (27) 6-2, 6-3. The Czech will next face Croatia's Donna Vekic (26).
12:36 CET - The day's play is underway around the European clay tournaments that are on offer this week.
Stay tuned to the Tennis Tracker for highlights and results from the WTA's epic indoor event in Stuttgart plus the best of the men's action from Banja Luka, Munich and Barcelona.
8:39 CET - Aryna Sabalenka (24) said she cannot control what Belarus President Alexander Lukashenko says about her and that while his comments may make her even more unpopular on the women's Tour she would "stop the war" in Ukraine if she could.
Read more about that here.
8:09 CET - Following a rib injury, Iga Swiatek (21) says she is now fully fit and ready to defend her Stuttgart crown.
Read more here.
8:00 CET - Novak Djokovic (35) returns to action following his early-round defeat in Monte Carlo, as he takes on teenager Luca van Assche (18) in Banja Luka later today. Alexander Zverev (25) also takes to the court in Munich, while plenty of stars are on show in Barcelona.
On the WTA Tour, there are some huge clashes in Stuttgart, with Coco Gauff (19), Elena Rybakina (23) and Aryna Sabalenka (24) all playing. It's set to be a busy day.
