Novak Djokovic into 2019 Australian Open Semi-Finals After Kei Nishikori Retires

1:54am PST - January 23rd, 2019    novak djokovic - Bleacher Report

Novak Djokovic advanced to the semi-finals of the 2019 Australian Open after an exhausted Kei Nishikori retired from their last-eight clash on Wednesday...