Djokovic defeats Nadal at Paris Olympics

Novak Djokovic defeated Rafael Nadal in straight sets during the second round of the Olympic Games. This match marked the 60th and likely final encounter between the two tennis legends. Despite holding the record for the most Grand Slam titles, Djokovic has yet to secure an Olympic gold medal in his illustrious career.

What is the implication of this being the 60th encounter between Djokovic and Nadal?

What has Djokovic not achieved in his career despite his success?