Zendaya as Tashi Donaldson

Mike Faist as Art Donaldson

Josh O'Connor as Patrick Zweig

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 Fernández as TV Sports Commentator (Atlanta 2019)

A.J. Lister as Lily

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 / Line Judge US Open Jr.

Jason Tong as Line Judge (New Rochelle Final)

Hudson Rivera as Y. Kucera (US Open Jr. Player)

Noah Eisenberg as T. Svoboda (US Open Jr. Player)

Emma Davis as A. Mueller (US Open Jr. Player)

Naheem Garcia as Tashi's Father

Alex Bancila as Grosu

Jake Jensen as Finn Larsen

Konrad Ryba as Player (New Rochelle Locker Room)

Hailey Gates as Helen (Patrick's Date)

Andrew Rogers as Art's Teammate (Stanford)

Beverly Kristenson Helton as Umpire (Stanford Match)

Brad Gilbert as Art's Trainer (Ohio 2011)

Sam Xu as Art's Fan

Caleb Schneider as Puppeteer