Under Bajin, Osaka won both the US Open and the Australian Open to rank World No. 1.
Bajin, the 2018 WTA Coach of the Year, publicly responded, thanking the 21-year-old via his personal Twitter account.
"Hey everyone, I will no longer be working together with Sascha", Osaka wrote on Monday night. She also thanked Bajin and wished him "all the best in the future".
Hugo Lloris: Tottenham must improve against Borussia Dortmund
The win keeps Tottenham in the Premier League title race, five points off the top, after their 20th win of the season. "Against a bigger side we couldn't have won that type of game".
Japanese sensation Osaka clinched her first ever Grand Slam at the US Open in NY past year with an impressive win over all-time great Serena Williams in the final, a victory somewhat overshadowed by a Serena tantrum that snowballed into a media furore over perceived sexism by an umpire. Under Bajin's tutelage, she held her first title in at Indian Wells in March a year ago and made her major breakthrough at Flushing Meadows by defeating Serena Williams in the final.
In this file photo taken on January 26, 2019, Sascha Bajin (front 2nd left), coach of Japan's Naomi Osaka, watches Osaka play against Czech Republic's Petra Kvitova during the women's singles final on day 13 of the Australian Open tennis tournament in Melbourne.
By winning a second grand slam and becoming world No 1, she firmly established herself as at the forefront of the next generation of women players.