World number one Naomi Osaka says she was not willing to “sacrifice” her happiness following her surprise split from coach Sascha Bajin last week. Osaka split with Bajin 16 days after winning the Australian Open, which sealed back-to-back major titles after she won her first at the 2018 US Open. “Everyone thinks it was a…

World tennis number one Naomi Osaka has split from her coach Sascha Bajin just 17 days after completing back-to-back Grand Slam victories at the Australian Open.