Coco Gauff in the evening of San Jose gave a show against Naomi Osaka, overcome 6-4 6-4 thus reaching the quarter-finals.
"I think I have improved in all aspects - said the 18-year-old American -. Naomi from the bottom is one of the best, but today I stood up to her, I won many more points from behind her. And this shows my progress. many hours on the pitch in the last three weeks are paying off. "
In the quarterfinals Gauff will face the Spanish Paula Badosa who risked elimination against Elizabeth Mandlik, the daughter of Hana Mandlikova (Czech tennis icon, included in the Hall of Fame) who arrived twice to serve for the match in the third set.