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Naomi Osaka: 'I want to leave some sort of legacy'

(CNN)Naomi Osaka has learned a lot about dealing with expectations in 2019.The Japanese cemented her star status with a second straight grand slam title at the Australian Open in January having clinched her maiden major at the 2018 US Open.But she struggled with the attention that came with being world No.1 and came up short in the year's other three grand slams.Osaka went nearly eight months without winning a title, but two victories in two consecutive WTA Tour events have given her serious momentum for the WTA Finals in Shenzhen, China.So what's the secret behind Osaka's uptick in form? "I think (my) mindset," she told CNN. "I think I'm more confident in myself than I was before. "Before I would have had a little bit of self-doubt, which ...