Kei Nishikori has been forced to withdraw from his Australian Open quarter-final, handing world No.1 Novak Djokovic a passage into the last four.
Djokovic will face unlikely French semi-finalist Lucas Pouille for the chance to return to the final for the first time since 2016.
Nishikori was heavily troubled by a thigh injury on Wednesday night, retiring with the score 6-1 4-1.