16:28 CET - Elena Rybakina has completed a perfect WTA Finals round-robin campaign, making it three wins from three after clinching a 6-4, 6-4 victory over Ekaterina Alexandrova - who replaced the unwell Madison Keys for this dead rubber.
Rybakina tops the group, and up next is a mouthwatering third clash of the year between Iga Swiatek and Amanda Anisimova. The winner will join Rybakina in the semi-finals.
Follow that match live with Flashscore!
15:49 CET - Young gun Learner Tien has moved into the next round in Metz, claiming a 7-6(3), 6-3 win over qualifier Moez Echargui.
15:20 CET - The first game of the afternoon in Athens has been won by Miomir Kecmanovic as he came from a set down to come out on top in a battle against third seed Luciano Darderi to win 4-6, 6-2, 6-3.
13:10 CET - The first match of the day in Metz has reached its conclusion as Kyrian Jacquet outclassed fellow Frenchman Dan Added 6-0, 6-2.
10:20 CET - Good morning and welcome back to the Tennis Tracker!
There is plenty of action to look forward to throughout the day in Metz and Athens, with Alexander Bublik and Matteo Berrettini set to take to the court later this afternoon, as well as an exciting clash between Lorenzo Musetti and Stanislas Wawrinka.
Over at the WTA Finals, play begins at 15:00 CET, as Elena Rybakina takes on Madison Keys in a dead rubber. The former has already secured top spot in the group, while the latter has been knocked out.
However, the standout clash of the day follows with Iga Swiatek facing Amanda Anisimova, and the winner will book their spot in the semi-finals!