Tennis has produced many great champions, but only a few have built careers that changed the sport. From Roger Federer’s elegant playing style to Rafael Nadal’s dominance on clay and Novak Djokovic’s record-breaking achievements, each has a strong claim to greatness. The debate over the GOAT of tennis, meaning the Greatest of All Time, often centres on these three players. They dominated men’s tennis for almost two decades and pushed each other to achieve extraordinary results. However, choosing one player is not as simple as counting Grand Slam titles. Weeks at world No. 1, Masters 1000 trophies, Olympic success, consistency…