Alexandar Zverev's Physical Trainer Dalibor Sirola divulges Sascha’s Grand Slam Drought

In an exclusive chat with ES, renowned strength and conditioning coach and personal trainer Dalibor Sirola gives insights into his fitness regimen and professional relationship with star players like Alexander Zverev and Milos Raonic over the years. He also reveals the conversation with Maria Sharapova, just hours before he announced her retirement from professional tennis, and why he reckons her a tennis legend. During the conversation, he also revealed why modern-day tennis players are fitter than ever and what keeps him going after spending over two decades in the sport.