The May 21, 1988 Edition of WWF Superstars of Wrestling is a Professional wrestling television show of World Wrestling Federation, which took place on May 10, 1988 at the Entertainment Convention Center in Duluth, Minnesota.
- Numbers in parentheses indicate the length of the match.
- (c) refers to the champion(s) heading into the match.
- Dark match: Koko B. Ware defeated Bobby Heenan
- Dark match: Ken Patera defeated Dino Bravo by DQ
- Dark match: Jake Roberts defeated Rick Rude
- Randy Savage (c) (w/ Miss Elizabeth) defeated Virgil (w/ Ted DiBiase) to retain the WWF Championship (5:34)
- Greg Valentine (w/ Jimmy Hart) defeated Jim Evans (2:16)
- Bret Hart (w/ Jimmy Hart) defeated Steve Lombardi (1:48)
- Don Muraco (w/ Superstar Billy Graham) defeated Billy Anderson (1:25)
- Rick Rude (w/ Bobby Heenan) defeated Scott Casey (1:37)
- Demolition (Ax & Smash) (w/ Mr. Fuji) defeated Buck Zumhofe & Warren Bianchi (1:47)
- Koko B. Ware defeated Terry Gibbs (2:00)