US Open 2021: Novak Djokovic beats Kei Nishikori in four sets

Novak Djokovic is still four victories missing to win the calendar grand slams. The number one in the world won in the third round of the US Open 2021 against Kei Nishikori 6: 7 (4), 6: 3, 6: 3 and 6: 2.