Carlos Alcaraz beat Daniil Medvedev to top his ATP Finals group and set up a semi-final meeting with Novak Djokovic.
"Obviously Novak is Novak, he's the best player in the world right now," said Alcaraz on facing Djokovic.
Medvedev, an ATP Finals champion in 2020, will face Green Group winner and Italian home favourite Jannik Sinner.
More to follow.