Serbian legend and 24-time Grand Slam champion Novak Djokovic moved into the semi-finals of the Australian Open 2026 as his opponent, Lorenzo Musetti, was forced to retire while leading 6-4, 6-3, 1-3 in the pair's quarter-final clash on Wednesday. By stepping on court Wednesday, Djokovic became just the third man to compete in 1,400 tour-level matches.