Naomi Osaka, the world No 1, lost to Kristina Mladenovic at the Dubai Duty Free Tennis Championships on Tuesday night. Kamran Jebreili / AP Photo
Naomi Osaka, the world No 1, lost to Kristina Mladenovic at the Dubai Duty Free Tennis Championships on Tuesday night. Kamran Jebreili / AP Photo

Dubai Tennis: Beaten Naomi Osaka concedes struggling to handle pressure