Mike Faist as Art Donaldson, Josh O'Connor as Patrick Zweig, Zendaya as Tashi Donaldson, Darnell Appling as Umpire (New Rochelle Final), Bryan Doo as Art's Physiotherapist, Shane T Harris as Art's Security Guard, Nada Despotovich as Tashi's Mother, Joan Mcshane as Line Judge (New Rochelle Final), Chris Fowler as TV Sports Commentator (Atlanta 2019), Mary Joe Fernandez as TV Sports Commentator (Atlanta 2019), A.J. Lister as Lily (as AJ Lister), Connor Aulson as Leo Du Marier, Doria Bramante as Woman with Headset (Atlanta 2019), Christine Dye as Motel Front Desk Clerk, James Sylva as Motel Husband, Kenneth A. Osherow as Motel Husband, Kevin Collins as New Rochelle Parking Lot Guard, Burgess Byrd as USTA Official