23:30 CET - Laslo Djere (28) has opened up with a win in Buenos Aires while Matteo Arnaldi (22) has done the same in Delray Beach.
The final encounter of the day in Rotterdam sees Felix Auger-Aliassime (23) taking on Maxime Cressy (26).
Tune in to the Tennis Tracker tomorrow for a roundup of the major overnight results plus the best of Tuesday’s action.
21:25 CET - In the final match in Doha for the day, sixth seed Marketa Vondrousova (24) has beaten Greet Minnen (26) 6-2, 0-6, 6-4 after having a bye in the first round.
The second round continues tomorrow with the rest of the top seeds entering the fray.
20:35 CET - The first round of the Argentina Open in Buenos Aires is underway and the opening match has seen local wild card Facundo Diaz Acosta (23) defeat Germany’s Daniel Altmaier (25) 6-3, 7-6(1).
Stay tuned to the tracker for all the action from Buenos Aires throughout the week as well as the men’s action in Rotterdam and Delray Beach, Florida.
19:30 CET - Iga Swiatek (22) is utterly relentless in the opening rounds of tournaments. The world No.1 dismantled Sorana Cirstea (33) 6-1, 6-1 in just over an hour to reach the next round in Qatar.
18:45 CET - Marie Bouzkova (25) has been involved in a thriller with Sofia Kenin (25), eventually triumphing 7-5, 2-6, 7-5 after two hours and 56 minutes.
18:14 CET - Another high-ranking seed has fallen in Doha with Beatriz Haddad Maia (27) losing 6-1, 6-3 to Xinyu Wang (22).
In Rotterdam meanwhile, Milos Raonic (33) has beaten Jesper de Jong (23) 7-6, 6-4.
18:10 CET - Naomi Osaka (26) has picked up what feels like a big win in Qatar, avenging her Australian Open defeat to Caroline Garcia (30) with a 7-5, 6-4 victory.
Read more about Osaka's win in Doha here.
17:34 CET - A few more results are in from the WTA 1000 event in Doha. Daria Kasatkina (26) has been knocked out after suffering a 6-2, 7-6(2) defeat to Anastasia Pavlyuchenkova (32) just a day after her defeat in the Abu Dhabi final to Elena Rybakina.
Linda Noskova (18) is safely through, however, beating Bernarda Pera (28) 6-3, 7-6(8).
16:29 CET - Victoria Azarenka (34) was involved in a real tussle with Magdalena Frech (26) but eventually found a way to her opponent 6-3, 3-6, 6-3.
16:03 CET - In the first match of the day in Rotterdam, David Goffin (33) outlasted Dino Prizmic (18) 6-4, 6-7(12), 6-1 in just under three hours.
In Qatar, Leylah Fernandez (21) secured a good 7-5, 7-6(4) victory over Liudmila Samsonova (25).
13:56 CET - Emma Raducanu (21) has been dumped out of the Qatar Open after suffering a really disappointing 6-0, 7-6(6) loss to Anhelina Kalinina (27).
In other results from Doha, Elise Mertens (28) cruised past Peyton Stearns (22) 6-2, 6-3, while Paula Badosa (26) finished off her match from yesterday, battling past Ashlyn Krueger (19) 6-3, 4-6, 6-4.
10:35 CET - Naomi Osaka (26) hasn't enjoyed the best of starts to her comeback, losing her last three matches, but is remaining optimistic heading into the Qatar Open nonetheless.
09:08 CET - All eyes today will be on Doha, where a star-studded Qatar Open is entering its second day with Iga Swiatek (22) and Naomi Osaka (26) both taking to the court.
Swiatek has won the past two editions of the tournament but is trying not to think about that as she bids to make it three in a row.
08:39 CET - Hello and welcome to Flashscore's coverage of today's tennis!
