To mark the 40th anniversary of the ATP Rankings, the ATP hosted a ‘No. 1 Celebration’ on Friday, 23 August, in New York City. Current and former World No. 1s were in attendance, including Novak Djokovic, Roger Federer, Ivan Lendl, Bjorn Borg and Ilie Nastase. Pretty cool to see all these amazing tennis legends in one place. This video is 2 hours long.