article_snippet: Kei Nishikori was made to sweat before finishing off local boy Ryan Harrison in straight sets .
article_snippet: Nishikori, who became the first Asian male to reach a grand slam singles final at the U.S. Open last year, broke Ryan Harrison five times while losing Ryan Harrison own serve on three occasions before sealing Ryan Harrison win in just under an hour and a half. '
highlights_snippet: Kei Nishikori was forced to work harder in Kei Nishikori defeat of  Ryan Harrison .