The coach behind Jannik Sinner's five Grand Slams and world No. 1 ranking will exit at year's end, forcing a big reset for tennis's top man.
Jannik Sinner's championship machine is about to lose one of its key engineers. The coach who helped guide the Italian to five Grand Slam titles and the top of the world rankings will leave the player's camp when the year ends.
The timing makes this a major story. Sinner is operating at the very peak of the sport, and the partnership has delivered the biggest prizes in tennis along with the world number one spot. Few player-coach relationships in recent years have produced results on that scale.
The departure does not come in the middle of a slump or a crisis. It comes after sustained success, which means Sinner now faces the challenge every elite athlete dreads: keeping a winning formula intact while one of its main ingredients changes.
The question for the months ahead is how the rest of Sinner's team adapts and what shape his coaching setup takes next. With the sport's biggest trophies and the number one ranking within his grasp, the transition will be watched closely across the tour.
