Karolína Plíšková prevails 💪🏻 Alexander Zverev fends off 👊🏻 Sevastova stops the teen 🛑 Steve Johnson outlasts 😮 Novak Djokovic cruises 🚗 Naomi Osaka 大坂なおみ escapes 🏃🏽‍♀️ Day 1 at the US Open Tennis Championships did not disappoint. #ICYMI | #USOpen