Madison Keys —
The 23yearold American smacks the ball as hard as anyone, but she lacks the consistency, defensive skills and tactical acumen of her good friend Stephens, who outplayed and outsmarted her in the US Open final a year ago and in the French Open semifinals this year. Put differently, her highreward, highrisk style results in way too many errors. And that results in bad losses, such as to No. 120 Evgeniya Rodina at Wimbledon, No. 117 Danielle Collins at Indian Wells and No. 129 Sara Sorribes Tormo at Madrid. Her onedimensional game will lose early at Flushing Meadows.