Naomi Osaka n'est plus entraînée par Sascha Bajin https://www.lequipe.fr/Tennis/Actualites/Wta-naomi-osaka-n-est-plus-entrainee-par-sascha-bajin/987944
No. 1 Naomi Osaka splits with coach two weeks after 2nd major title http://www.espn.com/espnw/sports/article/25974667/no-1-naomi-osaka-splits-coach-two-weeks-2nd-major-title
Unexpected Naomi Osaka announcement shocks the tennis world https://www.news.com.au/sport/tennis/unexpected-naomi-osaka-announcement-shocks-the-tennis-world/news-story/e1012bb65ce6e20db2dd987d46fb89eb
A memorable partnership comes to an end. Two weeks after winning the #AusOpen, @Naomi_Osaka_ announces she is no longer working with coach Sascha Bajin. https://twitter.com/AustralianOpen/status/1095137729799548928 https://twitter.com/5chan_nel (5ch newer account)
The news means that all four current women's Grand Slam champions have parted company with their coaches within the last year. https://edition.cnn.com/2019/02/12/tennis/naomi-osaka-sascha-bajin-coach-split-spt-intl/index.html