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TACHIKAWA, JAPAN - SEPTEMBER 23: Naomi Osaka of Japan is talked by her coach Sascha Bajin in the final against Karolina Pliskova of the Czech Republic on day seven of the Toray Pan Pacific Open at Arena Tachikawa Tachihi on September 23, 2018 in Tachikawa, Tokyo, Japan. (Photo by Koji Watanabe/Getty Images)

TACHIKAWA, JAPAN - SEPTEMBER 23: Naomi Osaka of Japan is talked by her coach Sascha Bajin in the final against Karolina Pliskova of the Czech Republic on day seven of the Toray Pan Pacific Open at Arena Tachikawa Tachihi on September 23, 2018 in Tachikawa, Tokyo, Japan. (Photo by Koji Watanabe/Getty Images)