23:16 CET - No. 1 seed Francisco Cerundolo has secured a seriously hard-fought victory in Santiago, battling past Yannick Hanfmann 6-2, 4-6, 7-6(5).
Meanwhile, Ajla Tomljanovic overcame Jodie Burrage 4-6, 6-3, 6-0 in Austin to secure a quarter-final spot.
21:18 CET - Jaime Faria has avoided any potential shocks against Brazilian Gustavo Heide by winning 6-7 (2-6), 7-6 (7-5), 6-2 in Santiago and booking his place into the last 16.
20:42 CET - Jessica Pegula has swatted aside Nuria Parrizas-Diaz in Austin, beating the Spaniard 6-1, 6-3 to move into the quarter-finals.
20:35 CET - Stefanos Tsitsipas has claimed a fantastic win in Dubai, overcoming Karen Khachanov 7-6(4), 2-6, 6-4 to set up a quarter-final with Matteo Berrettini.
Meanwhile, McCartney Kessler claimed a victory in Austin, while Federico Coria was victorious in Santiago.
19:45 CET - Over to Santiago and in-form Laslo Djere has stunned number four seed Pedro Martinez to win in straight sets 6-1, 6-4.
19:19 CET - Matteo Berrettini is safely through to the next round in Dubai after coming through a tense opening set to defeat Christopher O'Connell 7-6(2), 6-2.
Meanwhile, in Austin, Anna Blinkova has sealed her spot in the quarter-finals, with the Russian easing past Tatjana Maria in straight sets, 6-2, 6-2.
17:57 CET - Top seed Daniil Medvedev has produced an assured display in Dubai, dispatching the big-serving Giovanni Mpetshi Perricard in relatively routine fashion, 6-4, 6-4.
17:32 CET - Quentin Halys is the latest winner in Dubai, with the Frenchman battling past Roberto Bautista-Agut in two closely fought sets, 7-6(5), 6-4.
16:02 CET - Tallon Griekspoor has just claimed a huge win in Dubai, defeating defending champion Ugo Humbert from a set down, 4-6, 6-3, 6-2.
He will face the winner of Daniil Medvedev and Giovanni Mpetshi Perricard, who are on court next.
15:38 CET - Lucky loser Luca Nardi is the next player through in Dubai after downing Zizou Bergs in two competitive sets, 6-4, 7-6(3).
13:44 CET - Felix Auger-Aliassime's excellent start to 2025 shows no signs of slowing down, with the Canadian recovering from a set down to defeat Nuno Borges 4-6, 6-3, 7-5 in Dubai.
Marin Cilic is also through to the next round at the ATP 500 event after a mightily impressive 5-7, 6-3, 6-4 comeback win over Alexei Popyrin.
09:56 CET - The best of today's action comes in Dubai, where top seed Daniil Medvedev takes on big-serving Frenchman Giovanni Mpetshi Perricard and Stefanos Tsitsipas comes up against Karen Khachanov.
Felix Auger-Aliassime, Ugo Humbert and Matteo Berrettini also take to the court later on at the ATP 500 event.
Check out the full draw in Dubai here.
08:18 CET - There was plenty of tennis overnight in Acapulco, with top seed Alexander Zverev coming from a set down to outlast Matteo Arnaldi 6-7(2), 6-3, 6-4, while Holger Rune, Frances Tiafoe and Denis Shapovalov also progressed in Mexico.
Elsewhere, second seed Diana Shnaider battled through in Austin after recovering from a shocking start to defeat Tatiana Prozorova 0-6, 6-2, 7-5 and Maria Sakkari was sent packing in Merida, losing 5-7, 2-6 to Turkish wildcard Zeynep Sonmez.
Check out the full schedules in Acapulco, Austin and Merida via the links.
07:40 CET - Good morning and welcome to our coverage of today's tennis!