23:20 CET - That's all for today's tennis but be sure to tune in tomorrow as the top seeds enter the field in Linz and Montpellier and the second round gets going in Singapore!
23:14 CET - Ending the day in Linz, fifth seed Dayana Yastremska (24) has edged Lucia Bronzetti (26) 7-6, 7-5 to move into the second round.
Catch up on all the results from Linz here.
22:28 CET - In the last match of the day in Montpellier, Frenchman Arthur Rinderknech (29) has beaten compatriot Harold Mayot (22) 7-6, 2-6, 6-1 to advance.
Catch up on the results from Montpellier here.
21:25 CET - After an encouraging Australian Open, Germany's Eva Lys (23) has been knocked out in Linz at the first hurdle by Croatian veteran Petra Martic (34), who won their first-round match 6-4, 5-7, 6-3.
20:02 CET - A battle of French veterans has gone the way of Richard Gasquet (38) in Montpellier, with the former world number seven beating Adrian Mannarino (36) 6-3, 6-2.
17:20 CET - Moving back to Linz, sixth seed Anastasia Potapova (23) has cruised past Julia Grabher (28) into the second round with a comfortable 6-2, 6-2 win. Potapova will next face Rebecca Sramkova (28).
16:26 CET - Fifth seed Tallon Griekspoor (28) has toppled fellow Dutchman Botic van de Zandschulp (29) 7-5, 6-3 to progress to the second round in Montpellier.
16:02 CET - Rebecca Sramkova (28) has moved through in Austria, battling past Elisabetta Cocciaretto (24) 7-5, 7-5.
However, Borna Coric (28) was dumped out of Montepellier, losing 3-6, 5-7 to Constant Lestienne (32).
15:24 CET - New Zealand's Lulu Sun (23) was stunned in Linz, suffering a 3-6, 3-6 loss at the hands of qualifier Sara Sorribes Tormo (28).
Christopher Eubanks (28) had better luck in Montpellier, downing Alibek Kachmazov (22) 7-5, 6-4.
13:38 CET - On the back of a solid Australian Open where she reached the third round, Clara Tauson (22) has won 6-3, 6-3 against Anhelina Kalinina (27) in Linz.
11:55 CET - In the final match of the day in Singapore, Tatjana Maria (37) fought from a set down against Yuliia Starodubtseva (24) to clinch a 2-6, 6-1, 6-2 victory.
10:54 CET - No. 2 seed Elise Mertens (29) has cruised through in emphatic fashion, dismantling Australian Open women's doubles champion Taylor Townsend (28) 6-1, 6-0 in just under an hour.
Great Britain's Harriet Dart (28) was also stunned by qualifier Jil Teichmann (27) 3-6, 1-6, while No. 4 seed Xinyu Wang (23) battled past Rebecca Marino (34) 6-4, 5-7, 7-5.
09:08 CET - There's still a bit of action to come in Singapore with second seed Elise Mertens (29) facing Taylor Townsend (28) in the coming hours, and our attention will then turn to the ATP tournament in Montpellier and the WTA tournament in Linz.
07:30 CET - Hello and welcome to Flashscore's coverage of today's tennis!
There were a few upsets overnight in Singapore, with fifth seed Polina Kudermetova (21) losing 6-3, 6-2 to Kimberly Birrell (27) and eighth seed Moyuka Uchijima (23) being beaten 6-1, 6-7, 6-2 by Olivia Gadecki (23).