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.


Afghanistan seal 2027 World Cup berth, West Indies to go through qualifiers again
Former Australia cricketer Henriques to captain Portugal in World Cup qualifying
Rain in Montreal forces Canadian Open to reschedule men's quarter-finals
Swiatek cruises past Shnaider to reach Canadian Open semi-finals
UEFA, AFC, CONCACAF hit out at Infantino over World Cup stake sale
