Thiem victorious in ATP Finals opener, beats Tsitsipas in rematch

Dominic Thiem outlasted Stefanos Tsitsipas in a rematch of the 2019 final, beating the defending champion 7-6 (5), 4-6, 6-3 Sunday in the opening singles match at the ATP Finals inside a largely empty O2 Arena in London, England.

Stefanos Tsitsipas Lands 39 Straight First Serves In Comeback Win vs. Dominic Thiem, ATP Tour

Thiem's 7 round-up: Dominic Thiem wins opener against Casper Ruud in straight sets - Eurosport

Stefanos Tsitsipas - Wikipedia

Tennis: Medvedev beats Djokovic to reach semis at ATP Finals - The Mainichi

Andrey_Rublev

Matteo_Berrettini

Grand Slam legend expects Tsitsipas and Dominic Thiem win 2020 Slams

Stefanos Tsitsipas Outlasts Dominic Thiem to Win ATP Finals - The New York Times

Andrey_Rublev

ATP Finals: Tsitsipas overcomes Thiem to win title - Read Tennis