a) Daniil Medvedev
b) Novak Djokovic
c) Roger Federer
d) Rafael Nadal
Novak Djokovic on February 21, 2021, defeated Daniil Medvedev of Russia 7-5, 6-2, 6-2 in the finals of men’s singles at Australian Open 2021 to win his 9th Australian Title. This is Djokovic’s 18th Grand Slam win, just two behind Rafael Nadal and Roger Federer.