After reaching the Wimbledon 2025 quarter-finals, Novak Djokovic shared a funny story about his 11-year-old son Stefan, who has been eagerly collecting autographs from players except his own father's. Stefan even practiced with Djokovic's next opponent, Flavio Cobolli. Djokovic laughed, saying, "He has everyone's signature except mine. But that's okay. I'll accept that."