Novak led Serbia to the inaugural ATP Cup title when he followed up his huge win over Rafael Nadal (6-2, 7-6) with a victory in the deciding doubles encounter (w/Troicki) against Spain.
Three weeks later, Novak lifted the Australian Open trophy for the record-extending eighth time, following a hard-fought 6-4, 4-6, 2-6, 6-3, 6-4 victory over Dominic Thiem in the final. As a result, he is guaranteed to return to no.1 on February 3.
Novak captured his fifth crown at the Dubai Duty Free Tennis Championships when he defeated no.2 seed Stefanos Tsitsipas 6-3, 6-4 in the final.
World number one made history at the 2020 Western & Southern Open, defeating Milos Raonic 1-6, 6-3, 6-4 in the final to complete his second Career Golden Masters. He also won his 80th career title.
By clinching the fifth Italian Open title with a 7-5, 6-3 victory over Diego Schwartzman at the Foro Italico on September 21, Novak overtook Rafael Nadal at the top of the list for Masters trophies (36).
Novak has clinched the year-end no.1 ATP Ranking for a record-equalling sixth time. The Serbian star, who has finished as world no.1 for the sixth time in the past 10 years (also 2011, 2012, 2014, 2015 and 2018), is now level with his childhood hero Pete Sampras.