Stefanos Tsitsipas, who was the runner at this year's Dubai Duty Free Tennis Championship, has won the ATP Finals title.
He came from a set down to beat Dominic Thiem on Sunday night at the O2 Arena in London.
The 21-year-old from Greece took the match in a pulsating final-set tie-break.
Tsitsipas becomes the youngest winner of the season-ending ATP Finals in 18 years.


HotelPlanner tour: Emirati talent on show at Abu Dhabi Challenge
Kane considers NFL kicking career after football
Iraq and Oman share points in Gulf Cup
Jeddah welcomes eight nations for Arabian Gulf Cup
Alonso calls for changes after 'assassination' of F1 circuits
