Novak Djokovic reached the semi-finals of the Australian Open for a seventh time on Wednesday after eighth seed Kei Nishikori retired hurt when trailing 6-1 4-1 in their quarter-final.

Australian Open: Djokovic through to semi-finals after Nishikori retires

kie-nishikori

Kie Nishikori, News on Kie Nishikori, stories on Kie Nishikori, articles on Kie Nishikori, Kie Nishikori stories at Wion, Kie Nishikori news, Kie Nishikori latest news

kie nishikori

Australian Open: Djokovic through to semi-finals after Nishikori retires