Thursday's US Open round of 64 pits Katerina Siniakova against Naomi Osaka on hard. Naomi Osaka is 7-3 across recent matches. Katerina Siniakova is 5-5 across recent matches.

Hold strength tells the story — 70.9% versus 61.1% on first-serve points in Osaka's favor. Osaka should have enough here, though Siniakova has the tools to make the scoreboard uncomfortable.