What is holding Sloane Stephens back?

An analysis from 2016: huge talent, but two different techniques in one game.

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Tennis court from above with a ball path – STephens · Groundstrokes

In summer 2016, Martin Baroch asked a question many observers were asking: why does Sloane Stephens so rarely deliver on her enormous potential at the big tournaments? His answer lies in technique – more precisely, in the fact that she switches between two ways of hitting.

Summary by The Strong Baseline. Original article: What is holding back American Sloane Stephens (1993/USA) by Dr. Martin G. Baroch on cpta-tennis.org.