Emma Navarro's mental notes help her beat former No. 1 Naomi Osaka at Wimbledon

Naomi Osaka of Japan plays a forehand return to Emma Navarro of the United States during their match on day three at the Wimbledon tennis championships in London, Wednesday, July 3, 2024. (AP Photo/Alberto Pezzali)

LONDON (AP) — To be sure, Emma Navarro used clean tennis to defeat Naomi Osaka at Wimbledon on Wednesday: just five unforced errors compared to 16 winners; zero break points faced; a 4-for-4 success rate at the net.

What else helped Navarro reach the third round at the for the first time by eliminating — a four-time major champion and former No. 1 — 6-4, 6-1 in under an hour at Centre Court? Little reminders the 23-year-old American types into her cellphone's notes app before each match.

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