
Federer’s Former Coach Commends Sinner’s Mental Resilience in Doping Case
Jannik Sinner‘s resilience during the recent doping saga showed former ATP player and former Roger Federer’s coach, Ivan Ljubicic, just how mentally tough the Italian is. As a former player based in and around Italy for a long time, Ljubicic is quite familiar with the scene. He’s known about Sinner for a very long time…