A spot in the next round is at stake on Monday, when Dayana Yastremska goes up against Janice Tjen in the Monterrey round of 32. Janice Tjen is 3-7 across recent matches. Dayana Yastremska has dropped 2 straight and sits at 5-5 over the last ten.

The serve is where this match separates: Tjen has been winning 67.4% of first-serve points to Yastremska's 62.3%, and on hard that gap compounds fast. Little separates them; Tjen gets the nod on the finest of margins.