Comin' in hot 🔥 Ash Barty 🇦🇺 Alex De Minaur 🇦🇺 Frances Tiafoe 🇺🇸 Stefanos Tsitsipas 🇬🇷 Danielle Collins 🇺🇸 Amanda Anisimova 🇺🇸 These young players are owning 2019.