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(From L to R) Japan's head coach Toshihisa Tsuchihashi poses with players Kurumi Nara, Naomi Osaka, Makoto Ninomiya and Miyu Kato as they hold their national flag after beating Britain in their Fed Cup World Group II tennis play-off in Miki, Hyogo prefecture on April 22, 2018. (Photo by JIJI PRESS / JIJI PRESS / AFP) / Japan OUT (Photo credit should read JIJI PRESS/AFP via Getty Images)

(From L to R) Japan's head coach Toshihisa Tsuchihashi poses with players Kurumi Nara, Naomi Osaka, Makoto Ninomiya and Miyu Kato as they hold their national flag after beating Britain in their Fed Cup World Group II tennis play-off in Miki, Hyogo prefecture on April 22, 2018. (Photo by JIJI PRESS / JIJI PRESS / AFP) / Japan OUT        (Photo credit should read JIJI PRESS/AFP via Getty Images)