Novak Djokovic closing in on his greatest ATP rankings achievement

Greatness can be measured by the longevity of success and on that criteria, Djokovic is in a league of his own as he closes in on 400 weeks as world No 1.

US Open: Winning calendar Grand Slam would be my greatest achievement – Djokovic

Novak Djokovic wins his 23rd Grand Slam title by beating Casper Ruud in the French Open final

French Open: Novak Djokovic is the best of all time, says Mats Wilander, but the greatest is a different question - Eurosport

Djokovic beats Tsitsipas for 10th Australian Open title, 22nd Grand Slam – Orange County Register

Novak Djokovic one win away from achieving goal bigger to him than winning ATP Finals, Tennis, Sport

Novak Djokovic, World's Best Returner, Is Now Topping Serving Charts, Too!, ATP Tour

US Open: Novak Djokovic tames Taylor Fritz to enter record 47th Grand Slam semi-final

Novak Djokovic wins his 23rd Grand Slam title

Novak Djokovic 'is the best in history' and 'I congratulate him for everything he is achieving' says Rafael Nadal - Eurosport

Novak Djokovic wins his 23rd Grand Slam title by beating Casper Ruud in the French Open final – KGET 17

Novak Djokovic, Ben Shelton Are US Open's Biggest Winners

Novak Djokovic is 'the best player in the history of men's tennis' but he is leaving a 'complicated' legacy off the court - KVIA