The ultimate goal for a professional tennis player, male or female, is to win a Grand Slam event.
Kei Nishikori, the world's sixth-ranked player, is no exception.
But the Olympics is a different animal, and provides a special motivation, Nishikori said.
With your current subscription plan you can comment on stories. However, before writing your first comment, please create a display name in the Profile section of your subscriber account page.