A reminder that @CocoGauff is just 18 years of age 😮 Only American to have reached 10 WTA semi-finals before turning 19 in the past 30 years 🇺🇸 2️ WTA 1000 semi-final appearances 👏🏿 2️ semi-final appearances already this year 🔜 #DDFTennis #WTA @WTA https://t.co/6xK5QyAjPg