Jannik Sinner rallied for a watershed win over world number one Novak Djokovic at the ATP Finals in Turin on Tuesday.
Carlos Alcaraz suffered defeat a 6-7 (3) 6-3 6-4 to Alexander Zverev on his ATP Finals debut in Turin.
The indomitable Novak Djokovic will finish 2023 as the world's top-ranked men's player after he defeated Holger Rune in his opening match of the season-ending ATP Finals on Sunday.
Rafael Nadal saved some honour on Thursday, beating Casper Ruud 7-5, 7-5 as he bowed out of the ATP Finals in Turin at the pool stage.
Rafael Nadal said he was slow and rusty as he suffered a disastrous start to his bid to win the ATP Finals for the first time after crashing to a 7-6 (7/3), 6-1 defeat to Taylor Fritz on Sunday.