Stock Watch for Rafael Nadal's Biggest Challengers at 2015 French Open — bleacherreport.com

Stock: Up. The best thing about his rise over the past year is that Kei Nishikori is determined to keep climbing. Unlike the greater inconsistencies of his generation, Nishikori's only problem at the Australian Open was getting bludgeoned by Stanislas Wawrinka's best match of the year. Since then, Nishikori has taken Memphis for the third consecutive year and is looking to notch Mexico onto his belt.

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