09:00 CET - The first major shock of the day comes from Auckland, where Hungarian Fabian Marozsan has stunned second seed Casper Ruud in straight sets to take a 6-4, 6-4 victory and move into the next round.
08:15 CET - Over to Adelaide and ninth seed Diana Shnaider has come through a battle against Katerina Siniakova to win 6-1, 2-6, 7-5 and book her place in the next round.
07:30 CET - Good morning and welcome back to another busy day of action from Adelaide, Hobart and Auckland.
First of all, we have a host of overnight results to bring you from all three tournaments, including action from the ATP and WTA versions of the Adelaide tournament.
On the men's side in Adelaide, there were victories for Jaume Munar, Ugo Humbert and Tomas Machac, whilst Tommy Paul won an all-American affair 6-4, 6-4 against Reilly Opelka to book his place in the next round.
On the women's side of the tournament, meanwhile, Jaqueline Cristian was victorious in the opening match of the session before Madison Keys cruised past Czech teenager Tereza Valentova 6-4, 6-1.
Over to the ATP Auckland event and after wins for Sebastian Baez and talented Italian Luciano Darderi, excting French youngster Giovanni Mpetshi Perricard came from a set down against fifth seed Cam Norrie to win 4-6, 6-3, 7-6 (4) in an epic battle.
Finally, from Hobart, the standout overnight winners were Emma Raducanu and rising star Iva Jovic.
Check out the full schedule for tournaments in Adelaide (ATP), Adelaide (WTA), Auckland (ATP) and Hobart (WTA) via the links.