A new Prime Video documentary, "Novak Djokovic: The Wolf in Winter," directed by Jason Hehir, explores the tennis champion's career and looming retirement. In an interview with Variety, Hehir explains he was drawn to Djokovic as a compelling, controversial and polarising figure, and wanted to examine how, at 39, he balances continued dominance on court with his role as a father, while also confronting when to finally step away from the sport.

The documentary, now streaming on Prime Video, traces Djokovic's rise during the Roger Federer and Rafael Nadal "Big Three" era, including his first Grand Slam win over Federer at the 2008 Australian Open and his defeat of Nadal in 2011, which took him to world No. 1. Djokovic holds a record 428 weeks at No. 1 and 24 Grand Slam singles titles, plus an Olympic gold medal. Hehir also delves into Djokovic's traumatic childhood in war-torn Belgrade, where he sheltered from NATO bombing raids, noting that both Djokovic and his wife Jelena link his on-court emotional outbursts to unresolved trauma from that period.