15:51 CET - We're going the distance! Auger-Aliassime has edged a gruelling set in just over an hour, winning a tiebreak 9-7 after he and Shelton were unable to break one another's serves.
14:53 CET - It's advantage Shelton in the first match of the day, with the American winning what was a tight opening set 6-4 in 40 minutes.
14:20 CET - Today's opening singles match in Turin is now underway, as Ben Shelton and Felix Auger-Aliassime look to keep their hopes of a semi-final berth alive.
Follow point-by-point coverage here.
13:29 CET - We've had our first doubles result of the day, with Joe Salisbury and Neal Skupski making it two wins from two in the John McEnroe Group after a 7-6(7), 3-6, 10-7 triumph over Harri Heliovaara and Henry Patten.
12:05 CET - Good afternoon and welcome to our coverage of today's tennis at the ATP Finals in Turin!
The opening singles match of the day gets started in just under two hours, as Ben Shelton faces Felix Auger-Aliassime at 14:00 CET, with both players looking to secure a first win of the tournament and keep their hopes of a semi-final berth alive.
Later on, at 20:30 CET, home favourite and defending champion Jannik Sinner takes on Alexander Zverev, as both men target a spot in the last four after straight-set wins in their opening matches.
Keep track of the full schedule here.
