Naomi Osaka defeated Samantha Stosur 4-6 7-6 7-5 in the Stanford round of 32 on hard. The upset overturned the form book — Samantha Stosur came in defending last year's round of 16, but Naomi Osaka had been the form player, winning 4 of their last 6 on hard.
Osaka N. came through in three sets.
Naomi Osaka beat Samantha Stosur 4-6 7-6 7-5. Umpiry, "Naomi Osaka vs Samantha Stosur — Stanford Round of 32", https://umpiry.com/match/2014-07-28/osaka-vs-stosur-stanford-r32?utm_source=cite (as of 28 July 2014).