query: When did Juan Rivera win the WWC Universal Heavyweight title?
passage: WWC Universal Heavyweight Championship
Following this Burke would go on to feud with Juan Rivera who at the time was referred to as "TNT". Both wrestlers had been involved in a mid-card feud prior to this. Rivera won the championship on February 9, 1990, eventually losing it to Abdullah the Butcher, who lost it to Colón. The title was held up numerous times in 1991, as part of feuds between Colón, Greg Valentine and Dino Bravo.[1]
passage: Wilfredo Rivera
Due to the closeness of their first fight, and to the protests raised by boxing magazines both in Latin America and the United States (Rivera was even called the "uncrowned champion" on some outlets), the World Boxing Council ordered an immediate rematch. The second Rivera-Whitaker bout was fought at the James Knight Convention Center in Miami, Florida. At stake was not only the WBC world Welterweight title but also a big money fight versus WBC world Junior Welterweight champion Oscar de La Hoya, who was planning to challenge the rematch's winner. Rivera dropped the champion in round five with a body blow that landed after Whitaker apparently tripped on Rivera's left foot. Whitaker then responded by dropping Rivera with a left to the chin in round six. Rivera also lost a point during that round for a low blow.