Which of the following tennis player has won the 2021 ATP Finals?

A) Alexander Zverev
B) Novak Djokovic
C) Stefanos Tsitsipas
D) Daniil Medvedev

Explanation: In Tennis, Alexander Zverev of Germany beat World No.2 Daniil Medvedev of Russia, 6-4, 6-4, in the men’s single finals to clinch 2021 ATP Finals title on November 21, 2021, held at Turin in Italy