Naomi Osaka reveals her best victory

Naomi Osaka told that she will always count defeating her sister Mari Osaka as her best victory.

Naomi Osaka has achieved some pretty notable in her professional career,

as Naomi Osaka is a 4-time Grand Slam winner and has been ranked world No. 1.

Also, Naomi Osaka has defeated some of the biggest players of the game.

But defeating her older sister Mari Osaka will always be her best victory.

"That's my No. 1 victory, way before all the Grand Slams and stuff like that," Osaka said

"For me, I will count it as my best victory ever."

Mari Osaka, retired from tennis last year.

Now, Mari Osaka is pursuing a career in fashion designing. Recently, Mari Osaka designed the latest Yonex tennis racket.