Dominic Thiem has stormed into the semi-finals of the ATP Finals.
He's become the first player to qualify for the final four after upsetting Novak Djokovic in three sets.
Meanwhile, seven-time Dubai Duty Free Tennis Championships winner Roger Federer returned to winning ways with a straight-sets win over Matteo Berrettini.
That means he'll now take on Djokovic for a spot in the semi-finals.


Dimitrov marks return from pectoral injury with win in Paris
Real Madrid captain Carvajal faces knee surgery setback
Simeone and Baena strike as Atletico beat Betis to extend unbeaten run
Juventus sack coach Tudor after eight-match winless run
India's Iyer taken to hospital after fielding injury
