The Italian secured a 7-6 (7-4), 6-3 victory over the Serbian great, becoming the first man to win more than six titles in a calendar year since Andy Murray claimed nine in 2016. This one-hour and 37-minute win marked Sinner's personal best, bringing his season total to 65 victories.
The 33-year-old player equaled the record of his childhood hero, American Pete Sampras, who ended six straight years at the pinnacle of men's professional tennis between 1993 and 1998.
In the match against Tsitsipas, Djokovic won the first two sets comprehensively, but the fifth-seed Tsitsipas staged a comeback and won the third and fourth set, sending the match into the fifth and final set.