Topic summary
UFC
Extracted from the Wikipedia article Ultimate Fighting Championship.
Evolution of the rules and format
UFC 5 also introduced the first singles match, a rematch from the inaugural UFC featuring three-time champion Royce Gracie and Ken Shamrock, called "The Superfight". Gracie and Shamrock developed a rivalry after UFC 1 and were the biggest starts of early UFC, but the tournament format proved unreliable to match both competitors. "The Superfight" began as a non-tournament match that would determine the first reigning UFC Champion for tournament winners to face; it later evolved into a match that could feature either title matches or non-title matches.