Australian Open champion and new world No. 1 Naomi Osaka talked Sunday about her recent break with coach Sascha Bajin ahead of next week's Dubai Duty Free Tennis Championships.

Osaka, who revealed on Twitter last Monday she was parting ways with Bajin, said she put her happiness first and foremost when making the decision to find a new coach.

"I think my reason is I wouldn't put success over my happiness. That's my main thing," Osaka said at her first press conference since becoming the top women's singles player in the world.