Tsitsipas wins ATP Finals title

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.

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