Turin, 27 June (LaPresse) – Jannik Sinner's staff is changing on the eve of Wimbledon, the third Grand Slam of the season, which will start on Monday on the grass courts of London. According to sources close to the Italian tennis player, athletic trainer Marco Panichi and physiotherapist Ulises Badio have ended their collaboration with the world number one. Panichi and Badio joined Sinner's team last September, following the departure of Umberto Ferrari and Giacomo Naldi due to the consequences of the Clostebol case.