Friday's Osaka quarterfinal pits Antonia Ruzic against Katie Boulter on hard. Katie Boulter has won 5 of the last 10. Antonia Ruzic is 3-7 across recent matches.

The serve is where this match separates: Boulter has been winning 67.5% of first-serve points to Ruzic's 61.2%, and on hard that gap compounds fast. Expect resistance, but the match-level math tilts clearly toward Boulter.