Home Naomi Osaka of Japan speaks during a press conference on day one of the Toray Pan Pacific Open at Arena Tachikawa Tachihi on September 17, 2018 in Tachikawa, Tokyo, Japan.<br>(Photo by Koji Watanabe/Getty Images) Naomi Osaka of Japan speaks during a press conference on day one of the Toray Pan Pacific Open at Arena Tachikawa Tachihi on September 17, 2018 in Tachikawa, Tokyo, Japan.<br>(Photo by Koji Watanabe/Getty Images)

Naomi Osaka of Japan speaks during a press conference on day one of the Toray Pan Pacific Open at Arena Tachikawa Tachihi on September 17, 2018 in Tachikawa, Tokyo, Japan.
(Photo by Koji Watanabe/Getty Images)

Naomi Osaka of Japan plays a backhand in the Singles second round match against Dominika Cibulkova of Slovakia on day three of the Toray Pan Pacific Open at Arena Tachikawa Tachihi on September 19, 2018 in Tachikawa, Tokyo, Japan.<br>(Photo by Koji Watanabe/Getty Images)