Mexican National Middleweight Tournament, 1980
In late 1977, Sangre Chicana won the Mexican National Middleweight Championship, and started a reign which is said to included 38 title defenses. After his final defense, in March of 1979, the Mexico City Box Y Lucha commission forced him to vacate the championship, as they did not actually recognize him as champion. (The reasons for not recognizing him are unclear.)
The commission immediately began a tournament to determine a new champion. The tournament included wrestlers from many promotions, including EMLL, LLI and Super Libres, as well as the former champion.
Semifinals, June 1st, Arena Coliseo DF
Finals, June 8th, Arena Mexico