Nick Kyrgios has surprised tennis fans with a change of heart toward Jannik Sinner. After years of criticism and controversy, the Australian player, who returned to the court on September 4th after a suspension for a cocaine test, publicly praised the young Italian talent on social media. When asked by fans on Instagram about his comparison with the world number one, Kyrgios acknowledged Sinner's technical qualities, calling him "one of the best ball hitters tennis has ever seen" and "a baseline machine" capable of turning defense into attack with...