Caty Mcnally and Dayana Yastremska meet in the first round at Beijing on Wednesday. Caty Mcnally is 5-5 across recent matches. Dayana Yastremska has dropped 4 straight and sits at 3-7 over the last ten.

On paper it's close: comparable ratings, comparable serve numbers, small margins everywhere. Little separates them; Mcnally gets the nod on the finest of margins.