Jannik Sinner’s rivalry with Carlos Alcaraz has become the defining storyline in men’s tennis. But when it comes to recent hard-court dominance, there is no debate, the Italian stands alone.

Jannik Sinner won the season-ending ATP Finals without dropping a set Jannik Sinner became the youngest man to complete the set of hard-court trophies with victory over Daniil Medvedev in the Indian ...