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.


Sooryavanshi's record 175 guides India to Under-19 World Cup glory
India's Rana ruled out of T20 World Cup, replaced by Siraj
Dubai Basketball beats Real Madrid at home with decisive comeback
Alexandrova sets up semi-finals clash with Baptiste at Mubadala Abu Dhabi Open
France defeats Ireland with strong performance in Six Nations opener
