US Open 2021: Novak Djokovic beat Alexander Zverev in five-set marathon to enter finals

World number Djokovic defeated Zverev in the semi-finals 4-6, 6-2, 6-4, 4-6, 6-2 at the Arthur Ashe Stadium in New York. Djokovic will now take on Daniil Medvedev in the summit clash of the US Open.