The August 21, 2003 Edition of Smackdown is a Professional wrestling television show of the WWE's Smackdown brand, which will take place on August 19, 2003 at the Joe Louis Arena in Detroit, Michigan.
- Numbers in parentheses indicate the length of the match.
- (c) refers to the champion(s) heading into the match.
- Non Title Match: Rey Mysterio (w / Billy Kidman) defeated Matt Hardy Version 1.0 (w/ Shannon Moore) (12:07)
- Tag Team Match: The Basham Brothers (Danny Basham & Doug Basham) (w/ Shaniqua) defeated Billy Gunn & Jamie Noble (w/ Nidia & Torrie Wilson) (4:30)
- Singles Match: Zach Gowen defeated Brock Lesnar by DQ (2:03)
- Tag Team Match: John Cena & The A-Train defeated Orlando Jordan & The Undertaker (4:31)
- Tag Team Match: Eddie Guerrero & Rhyno defeated Chris Benoit & Tajiri (5:03)
- Non-title Street Fight: Kurt Angle defeated The Big Show (9:35)