That's it from Houston and Charleston today! The women's matches between Bernarda Pera-Sofia Kenin and Ann Li-Anna Blinkova will occur on Tuesday.
04:25 CET - In the final match of the night, Aleksandar Kovacevic takes down Tomas Martin Etcheverry in straight sets 6-3, 6-4 to advance to the next round in Houston.
04:23 CET - Corentin Denolly beats Brandon Holt in two hard-fought straight sets 7-6(7), 7-6(8).
03:00 CET - The remaining women's matches in Charleston have been postponed due to inclement weather.
02:30 CET - Alex Michelsen defeats fellow American Learner Tien in straight sets 6-4, 6-2 to advance to the next round in Houston.
01:40 CET - Over in Charleston, the match between Bernarda Pera and Sofia Kenin has been interrupted by bad weather. Kenin was up 4-2 in the first set.
01:32 CET - Jenson Brooksby advances to the next round in Houston after defeating Taro Daniel in straight sets 6-4, 6-4.
23:08 CET - Houston wildcard Cristian Garin is through to the second round after a 6-3, 6-4 victory over Swiss player Alexander Ritschard.
Meanwhile, in Charleston, Ajla Tomljanovic is through after seeing off Japanese wildcard Kyoka Okamura 3-6, 6-1, 6-2.
22:02 CET - Let's go back to Marrakech for the final result of the day, where Bolivian Hugo Dellien is through to the next stage thanks to a 7-5, 4-6, 7-5 victory against Aleksander Vukic.
21:14 CET - It's been a good hour or so for the Kudermetova sisters as Veronika has joined sibling Polina in Charleston's second round after a 6-0, 6-2 win over American wildcard Maria Mateas.
21:01 CET - A shock in Charleston as Anhelina Kalinina is out in Charleston. She was defeated by home qualifier Caty McNally in three sets 4-6, 6-1, 6-4.
20:56 CET - Staying in the USA, Polina Kudermetova is through to another day as she beat Irina Begu 6-3, 6-4.
20:11 CET - Over to Charleston, where Katie Volynets has breezed into the next round, thanks to a 6-0, 6-0 victory over Canadian qualifier Katherine Sebov.
19:44 CET - Fabio Fognini has been knocked out in Marrakech, with Raphael Collignon proving too strong for the Italian, coming out on top 6-3, 6-3 to claim his first-ever win on the ATP Tour.
18:37 CET - Experienced Frenchman Richard Gasquet is through in Bucharest, recovering from a set and 4-1 down to outlast Botic Van De Zandschulp 4-6, 7-5, 6-1.
Meanwhile, in Charleston, Caroline Dolehide and Robin Montgomery have sealed their spots in the next round after straight-set wins over Elisabetta Cocciaretto and Viktoriya Tomova respectively.
18:16 CET - Fifth seed Roberto Carballes Baena is the next man through in Marrakech, battling through a tough opening set to defeat Taha Baadi 7-6(3), 6-3 in just over two hours.
15:50 CET - In one of today's more low-key matches, home favourite Filip Cristian Jianu has progressed in Bucharest, seeing off Nishesh Basavareddy in straight sets, 6-3, 6-4.
13:46 CET - Seventh seed and 2024 finalist Mariano Navone is the first winner of the day in Bucharest, battling past Laslo Djere in a topsy-turvy contest 6-1, 4-6, 6-2.
11:20 CET - The clay-court season officially gets underway today, with tournaments taking place all around the world.
Up first in around 10 minutes, Laslo Djere takes on Mariano Navone in Bucharest. Meanwhile, Roberto Carballes Baena and Fabio Fognini are both in action in Marrakech this afternoon.
Some of the top seeds in Bagota, Marie Bouzkova and Alycia Parks, take to the court this evening, while the WTA 500 event in Charleston sees the likes of Veronika Kudermetova, Ajla Tomljanovic and Sofia Kenin begin their campaigns.
09:30 CET - Good morning and welcome to our coverage of today's tennis as the clay-court season begins!