Kei Nishikori

World number one Roger Federer believes Japanese teenager Kei Nishikori has the game to make the big time.

Returning to his favorite stage and resuming his dominant ways on grass, Roger Federer started his bid for a sixth straight Wimbledon title yesterday by sweeping Dominik Hrbaty in straight sets on a sunbathed Centre Court.

Kei Nishikori’s Grand Slam debut turned sour as the Japanese teenager was forced to withdraw from Wimbledon. Nishikori, making his first appearance at one…