Melbourne, Jan. 28 -- Serbian legend and 24-time Grand Slam champion Novak Djokovic moved into the semi-finals of the Australian Open 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.

Musetti's hopes of ending his Grand Slam drought against Djokovic were dashed in cruel fashion in Melbourne. Stepping onto Rod Laver Arena, having lost all three previous meetings with Djokovic at the majors, according to the ATP Tour website.

Musetti's quarterfinal magic was cut short by an upper-right leg injury, which struck in the third game's third set, after he'd built a two-set lead. The Italian battled on for a bit, even after a physio visit at 1-2, but couldn't keep g...