Prognósticos para Antonia Ruzic — Kayla Day

Kayla Day’s serve gives her a clear way to make Antonia Ruzic work for every recovery. Against Sofia Kenin, Day hit 10 aces, faced only two break points and won in straight sets; Ruzic, by contrast, had to keep breaking Paula Badosa after failing to hold every advantage in a three-set comeback.

That makes Day to win the appeal at a near-even price. Her controlled opener fits with her recent push to play more proactively, and she has said she is serving better than ever. Ruzic showed plenty of fight, but recent matches have not always seen her turn a lead into a secure finish.

There are reasons not to get carried away: Day lost to Maya Joint in qualifying before entering as a lucky loser, while Ruzic’s win came against the higher-ranked opponent. Day still has to reproduce her Kenin serving level, rather than merely borrow confidence from it.