15:54 CET - Alex De Minaur delivers! The Aussie has produced one of his best performances of the year to beat Taylor Fritz 7-6, 6-3 and knock the American out of the ATP Finals.
De Minaur will make the semi-finals if Carlos Alcaraz, who is now guaranteed a spot in the final four, wins tonight.
15:09 CET - De Minaur wins his first set of the ATP Finals! The Australian has edged the opener 7-6 after just under an hour to keep his hopes of making the semis alive.
14:20 CET - Taylor Fritz and Alex de Minaur are now underway in their decisive round-robin clash in Turin.
Follow point-by-point coverage right here.
13:43 CET - We've had our first doubles result of the afternoon, with already-eliminated Kevin Krawietz and Tim Puetz seeing off Simone Bolelli and Andrea Vavassori in a match tiebreak, 7-6(5), 4-6, 13-11.
11:30 CET - Good morning and welcome to our coverage of today's final round-robin matches in the Jimmy Connors Group at the ATP Finals!
The singles action gets underway at 14:00 CET as Taylor Fritz takes on Alex de Minaur, with both men targeting a place in the semi-finals.
A victory will guarantee Fritz a spot in the last four, regardless of the Alcaraz vs Musetti clash later on, while De Minaur's hopes of progression hang by a slim thread, as even a win against the American might not be enough.
Later on, at 20:30 CET, world number one Carlos Alcaraz comes up against Lorenzo Musetti, with the Spaniard needing just a set to seal his place in the last four.
However, he'll be determined to continue his winning form in Turin, as finishing the group with a perfect 3-0 record would guarantee Alcaraz the year-end No.1 ranking.
As for Musetti, the Italian must defeat Alcaraz to stand any chance of reaching the semi-finals, while hoping for a favourable result in the Fritz vs De Minaur clash.