Nakashima dumps de Minaur 4&0, and he's now up to a career high 74 in the world
if you look at the top 14 Americans by current ranking and age, the changing-of-the-guard is pretty apparent (Isner being the one exception still holding strong)
#26 Isner - 36 yo
#27 Opelka - 24 yo
#28 Fritz - 23...