Novak Djokovic and Rafael Nadal have had various disagreements over the years, often centered around issues like the scheduling of tournaments, player welfare, and the governance of the ATP. Their competitive rivalry sometimes leads to differing opinions, especially when it comes to topics like the Grand Slam format or the impact of injuries on their careers. Both players respect each other’s talents, but their perspectives on the sport can occasionally clash. If you have a specific disagreement in mind, I can provide more details.