A spot in the next round is at stake on Saturday, when Elise Mertens goes up against Naomi Osaka in the US Open round of 32. Naomi Osaka has won 7 of the last 10. Elise Mertens has won 3 in a row and 6 of the last 10 overall.

Hold strength tells the story — 70.9% versus 63.4% on first-serve points in Osaka's favor. Little separates them; Osaka gets the nod on the finest of margins.