※写真は「武漢オープン」(中国・武漢)の1回戦で敗れた大坂なおみ Photo:WUHAN, CHINA - SEPTEMBER 25: Naomi Osaka of Japan plays a backhand during the match against Elise Mertens of Belgium on Day 2 of 2017 Dongfeng Motor Wuhan Open at Optics Valley International Tennis Center on Septembe