2018年9月9號佢以兩盤6:2、6:4嘅比數，直落二盤贏咗佢嘅偶像Serena Williams，獲得職業生涯第一個美國網球公開賽同埋亦係大滿貫冠軍，同樣係第一位獲得大滿貫金盃嘅日籍選手。
On September 9, 2018, he defeated his idol Serena Williams in straight sets 6:2, 6:4 to win the first United States Open and or Grand Slam title of his career, and was also the first Japanese player to win a Grand Slam Gold Cup.