Tsitsipas ATP Finals triumph shows young guns are ready to rule

Rafael Nadal will end the year as the world's top-ranked player and the "big three" retained their stranglehold on the Grand Slam titles, but when Stefanos Tsitsipas was crowned ATP Finals champion on Sunday it felt like a watershed moment.

Tsitsipas ATP Finals triumph shows young guns are ready to rule
Rafael Nadal will end the year as the world's top-ranked player and the "big three" retained their stranglehold on the Grand Slam titles, but when Stefanos Tsitsipas was crowned ATP Finals champion on Sunday it felt like a watershed moment.