Naomi Osaka is prepping for the Western & Southern Open this week in Cincinnati with two things on her mind: having fun and listening to good music. What music exactly, asked Tennis Channel's Prakash Amritraj? The 21-year-old couldn't help but break into giggles as  she named YBN Cordae's The Lost Boy album.

"You should listen to it," she said.

Osaka has been linked with the rapper since last year, and has been posting some less-than-subtle hints about her passion for his music. They're still keeping their relationship, as the millennials would say, "low-key."

Osaka just reached the quarterfinals at the Rogers Cup, falling to Serena Williams, and returning to No. 1 in the rankings. She'll open against Aliaksandra Sasnovich on Wednesday.