Kei Nishikori of Japan celebrates after defeating Novak Djokovic of Serbia in their men's singles semi-final match on Saturday. Photograph: Julian Finney/Getty Images A pioneering Kei Nishikori......
A tireless Kei Nishikori shocked 17-time Grand Slam winner Roger Federer 3-6, 7-5, 6-4 on Wednesday to claim his second top five scalp in two days and reach the semi-finals of the Sony Open. After......