23:30 CET - Good evening and welcome back to our Tennis Tracker, as the second-round action continues in Melbourne on Thursday!
Play gets underway at 01:00 CET, with defending women's champion Madison Keys facing compatriot Ashlyn Krueger, while Jessica Pegula, Amanda Anisimova and Linda Noskova also take to the court in the early hours of the morning.
On the men's side of the tournament, 10-time former champion Novak Djokovic comes up against Italy's Francesco Maestrelli at around 03:30 CET. Ben Shelton, Lorenzo Musetti and Stan Wawrinka are among the other standout names in action overnight.
Later on, in the night session, Jannik Sinner continues his title defence against home hope James Duckworth, while Iga Swiatek faces a tricky test in the shape of Marie Bouzkova.
Taylor Fritz, Elena Rybakina, Naomi Osaka and Casper Ruud are also in action from 08:00 CET onwards.
Check out the full men's schedule here and the full women's draw here.