UFC 21: Return of the Champions è un evento di MMA del 16 luglio 1999. Si tiene a Five Seasons Events Center, Cedar Rapids, Iowa, U.S.. Qui trovi la card completa con i risultati degli incontri.
| Categoria | Incontro | Esito |
|---|---|---|
| Main Card | ||
| Heavyweight | Maurice Smith vs Marco Ruas | TKO (corner stoppage) R1 5:00 |
| Welterweight | Pat Miletich (c) vs André Pederneiras | TKO (doctor stoppage) R2 2:20 |
| Middleweight | Jeremy Horn vs Daiju Takase | TKO (punches) R1 4:41 |
| Middleweight | Paul Jones vs Flavio Luiz Moura | Submission (rear-naked choke) R1 4:20 |
| Heavyweight | Tsuyoshi Kosaka vs Tim Lajcik | TKO (corner stoppage) R2 5:00 |
| Middleweight | Eugene Jackson vs Royce Alger | KO (punch) R2 1:19 |
| Heavyweight | Andre Roberts vs Ron Waterman | KO (punch) R1 2:51 |
| Heavyweight | Travis Fulton vs David Dodd | Decision (unanimous) R2 5:00 |