The 31-year-old Serb clinched back-to-back Grand Slam triumphs by beating Argentine third seed Juan Martin del Potro in Sunday's US Open final.
Her victory over Serena Williams on Saturday was marred by the former world No 1's ferocious verbal attack on chair umpire Carlos Ramos.
Djokovic said in his postmatch news conference that he thinks the chair umpire interfered too much in Williams' match, but he stopped short of saying men and women are treated differently.
Novak Djokovic and Roger Federer, two of the most successful players in the history of the season finale, have joined Rafael Nadal as qualifiers for the Nitto ATP finals to be held at the O2 in London from November 11 to 18, according to media release.
No one has dominated the tennis courts in the past decade like Swiss legend Roger Federer and his eternal Spanish rival Rafael Nadal.
Prior to his Wimbledon crown, Djokovic had gone two years without a major title, struggling with form, fitness and motivation. For now his ranking climbs back inside the top five.
Djokovic had to work especially hard to win the year's final Grand Slam, despite the end tally showing he dropped a mere two sets. I really do, " said Djokovic, who gave del Potro a hug at the net and then consoled him as he wiped away tears at his sideline seat.
After holding his serve easily, an amped-up del Potro aggressively attacked Djokovic from the baseline in the next game.
Djokovic's third US Open title also moves him into a tie for fifth all-time in men's singles titles at New York City during the Open Era, joining Nadal, Oliver Campbell, Ivan Lendl and Fred Perry.
Djokovic passed those physical tests and no doubt enjoyed the cooler air that descended upon the Big Apple in time for his semifinal.
Despite not being ranked as high as his contemporaries - Nadal and Federer in the lead up to the US Open, Djokovic was considered as the favourite, and boy, did he live up to the billing! "That's what I got from them".
But instead of that victory proving a launch pad for a sustained challenge at the Grand Slams, Del Potro battled wrist injuries which required four surgeries. The US Open winners have been crowned.
Del Potro is known as one of tennis' good guys and modesty like this further reinforces that reputation.
Novak Djokovic has just served a huge financial ace. He won 79% of his first serve points in the first.
After winning the first set 6-3, Djokovic was leading 3-2 in the second set (having broken Del Potro) and was serving to extend his lead to 4-2. He played a great match, very smart game. "Ole Ole Ole. Delpo, Delpo" reverberated around the stadium in support of Del Potro. Federer had 23 break points, but Djokovic saved 19 of them.
Del Potro's movement went from nimble to clunky after that.
The crux of the match came midway through the second set. A series of missed forehands by del Potro in the tiebreaker put Djokovic back on course.
All that frustration was washed away when he struck the overhead victor to clinch victory over Del Potro, Djokovic falling to his back, arms and legs spread savoring the moment.
He's healthy. He has a great team working with him.