Who are YOU most excited to see on day four of the #USOpen? @bigfoe1998, @madisonkeys, @bernardapera, @tsandgren7, @tay_taytownsend, and @francesca_di_lorenzo97 will all be on court looking for R3 spots. Tune-in to @espn, @espn 3, @espn + to catch the action from Flushing Meadows. #tennis #francestiafoe #tiafoe #madisonkeys #majorkey #keys #Usta #love