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.


Police detain organiser of Messi visit after Indian fans rip up seats
Patel dominates as Mumbai take Game 1 of United Series
UAE though to Arab Cup semi-finals after beating Algeria on penalties
Dubai Basketball claim thrilling win over Bayern Munich in EuroLeague
Salah in Liverpool squad for Brighton match
