23:53 CET - An independent tribunal has suspended American player Jenson Brooksby (22) for 18 months after finding that he committed three whereabouts failures in a 12-month period.
23:45 CET - Our top play from the men’s action today came from Basel and Holger Rune's (20) win over Miomir Kecmanovic (24). The young Dane showed all his talent with this super volley.
Tune in again to the Tennis Tracker tomorrow for more from Basel, Vienna and the WTA Elite Trophy.
23:40 CET - Our moment of the day on the women's side had to come from the WTA Elite Trophy.
In the third match of the day in Zhuhai, Lin Zhu (29) defeated Veronika Kudermetova (26) 7-6 (5), 6-1. The Chinese player was in fine form and showed great skill in this point, too.
20:25 CET - Top seed Holger Rune (20) has moved into the second round in Basel after beating Miomir Kecmanovic (24) 1-6, 7-5, 6-3.
19:48 CET - Home favourite Dominic Thiem (30) has fallen at the first hurdle in Vienna, losing 7-6, 6-4 to fourth seed Stefanos Tsitsipas (25).
18:13 CET - In Basel, fifth seed Alex De Minaur (24) has won 6-4, 6-4 against Diego Schwartzman (31).
17:43 CET - World number eight Karolina Muchova (27) has withdrawn from the WTA Finals in Cancun due to a right wrist injury and will be replaced by first alternate Maria Sakkari (28) of Greece, tour officials have confirmed.
16:47 CET - Frances Tiafoe (25) is through in Vienna with opponent Dan Evans (33) being forced to retire while trailing 4-1 in the opening set.
15:50 CET - Over in Vienna, third seed Andrey Rublev (26) made it past Alexei Popyrin (24) in their first-round match. It ended 7-6(5), 6-4 to the Russian.
15:45 CET - In the day’s third match in Zhuhai, Lin Zhu (29) defeated Veronika Kudermetova (26) 7-6 (5), 6-1.
12:56 CET - World number 10 Barbora Krejcikova (27) has made a winning start in Zhuhai, beating Magda Linette (31) 6-2, 6-4.
11:57 CET - The winner of the first WTA Elite Trophy match since 2019 is Beatriz Haddad Maia (27), who has beaten Madison Keys (28) 6-4, 6-4.
In case you need reminding, the tournament - held in Zhuhai - is the second-tier women's year-end competition, with the 11 highest-ranked players outside the world's top eight that choose to compete taking part along with one wildcard. They're split into four groups of three, with the group winners advancing to the semi-finals.
07:45 CET - Hello and welcome to our coverage of today's tennis, which will see big names do battle on both the men's and women's side of the sport.