Naomi Osaka lost her serve seven times as Kristina Mladenovic beat a world number one for the first time in her careerJapan’s Naomi Osaka blamed scrutiny following the split from her coach for defeat in her first match since becoming world number one.The Australian and US Open champion, 21, was beaten 6-3 6-3 by France’s…

Naomi Osaka started working with Sascha Bajin (left) at the start of 2018World number one Naomi Osaka has split with her coach Sascha Bajin 16 days after winning the Australian Open.The Japanese 21-year-old, whose win in Melbourne sealed back-to-back Grand Slam titles, worked with the German for just over a year. “I will no longer…

Media playback is not supported on this device Osaka beats Kvitova in thrilling finalIn September, as bad blood spilled on to the Louis Armstrong Stadium Court in New York, Naomi Osaka shut out the enveloping acrimony and earned herself a maiden Grand Slam title.Four months later here in Melbourne – on the other side of…