Jannik Sinner is ending one of tennis’s most fruitful coaching alliances. On Friday the Italian announced that Darren Cahill will leave before 2027 and that Swedish mentor Magnus Norman steps into the box next to Simone Vagnozzi, who has guided Sinner since 2022.
Since Cahill arrived in mid-2022, Sinner collected five majors, two year-end championships, ten Masters 1000 titles and nearly two years’ worth of weeks atop the rankings. The Rome title this season completed a rare Masters sweep previously achieved only by Novak Djokovic. Cahill called the partnership a rare honour and praised the two-way trust that made it work.
Norman brings a résumé built with Robin Söderling’s top-five climb and Stan Wawrinka’s three Slam runs; his latest chapter with the Swiss closed when Wawrinka retired in Basel. A stubborn knee problem has kept Sinner off court since the Wimbledon triumph in July, so he is skipping every leftover tour stop and effectively handing Alexander Zverev the year-end No. 1. Organisers still list him for a December show event in Saudi Arabia as the first public comeback date.
In an Instagram clip Sinner told Cahill that much of who he is on and off court grew from those five seasons. Friendship continues; the coaching contract does not. For 2027 the box keeps Vagnozzi for continuity and adds Norman’s Slam-hardened voice — a reset timed for a comeback year rather than a mid-season gamble.
Cahill had floated stepping away in 2025 yet stayed through Wimbledon; ending now gives Norman and Vagnozzi a full winter block to settle before the comeback swing.
