UFC 21: Return of the Champions

UFC 21: Return of the Champions was a mixed martial arts event held by the Ultimate Fighting Championship on July 16, 1999 at the Five Seasons Events Center in Cedar Rapids, Iowa.

The event was seen live on pay per view in the United States, and later released on home video.

UFC 21 marked significant rule changes; Preliminary bouts now consisted of two five minute-rounds, main card bouts were three five-minute rounds, and championship bouts were five five-minute rounds (identical to the Unified Rules of Combat used today in the USA).

UFC 21 was the first UFC event to adopt the 10-point must system, commonly used in boxing, to judge fights. Headlining the event was a Lightweight Championship bout between Pat Miletich and Andre Pederneiras.