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.

All six participants — Nadal, Djokovic, Carlos Alcaraz, Jannik Sinner, Daniil Medvedev and Holger Rune — will be paid a guaranteed $1.5 million each for their appearance in the exhibition tournament. Whoever ends up on the champion’s throne will see his earnings further increase, with the winner set to receive a whopping $6 million.

Few people have been more influential on Rafael Nadal than his uncle Toni, but even he had some eyebrow-raising thoughts on one of tennis' biggest debates