西岡 良仁 / Yoshihito Nishioka upsets Nishikori 😮 Naomi Osaka 大坂なおみ prevails in 3 🎉 Ash Barty fends off Sharapova 👊🏼 Jan-Lennard Struff takes down Tsitsipas 👀 Karen Khachanov knocks out Kyrgios 💪🏼 These are the highlights from Day 4 at the Western & Southern Open, #ICYMI.