Novak Djokovic was defeated by Jannik Sinner in the Shanghai Masters final, but he looked lost after Rafael Nadal's retirement post. The Big Four era has lost three men.

Roger Federer feels his opinions of tennis foes Novak Djokovic and Rafael Nadal were clouded by the intense rivalries they shared.

Roger Federer, Rafael Nadal, Novak Djokovic, and Andy Murray—have dominated men’s tennis for nearly two decades. Their individual rivalries have produced some of the most thrilling and unforgettable matches in tennis history,