Greek yoiung gun Stefanos Tsitsipas beat Dominic Thiem of Austria in the finals of the Nitto ATP Finals at the 02 Arena, London. He won the 2-1 tie break of the 3rd set (6-7, 6-2, 7-6).
The win gives Tsitsipas the biggest title of his career to date, and it marks the successful transition from 2018 Next Gen ATP Finals champion to the Nitto ATP Finals crown in just a year.
Seeded sixth, he defeated fifth seed Thiem in a game that was played in over two hours and 35 minutes.
READ MORE: Tsitsipas beat six-time champ Roger Federer at ATP Finals
Aged 21, Tsitsipas is the youngest Nitto ATP Finals champion since former World Number 1 Lleyton Hewitt won in Sydney in 2001 at the age of 20.
Tsitsipas won 1,200 ATP rankings points in five matches this week and has earnt $2,656,000 in prize money.