Thomas Americo (December 24, 1958 – September 7, 1999) was an East Timorese professional boxer. Americo won the Oriental and Pacific Boxing Federation's Super Lightweight title in only his second recorded professional fight, and in only his third fight, he became the first Indonesian (at the time, East Timor had not gained independence from Indonesia) fighter to challenge for a world title, when he fought World Boxing Council Super Lightweight (Junior Welterweight) champion of the world, Saoul Mamby. In becoming the first Indonesian to fight for a world title, Americo became also the first boxer from East Timor to do so.
Thomas Americo began boxing professionally on April 19, 1980, taking on the far more experienced, Australian Eddie Buttoms, who had 60 wins, 13 losses and 7 draws (ties) but who was nearing the end of his own boxing career. This fight took place in Malang, and Americo upset his opponent with a ten round decision win, after which Buttoms retired. In his next fight, Americo was pitted against hot prospect Sang Mo-Koo of Busan, South Korea. Mo-Koo was being touted as a possible world title challenger for Mamby's WBC crown and had a record of 21-1-2, with 13 knockout wins. This bout was held on August 15, 1980 at Jakarta. Once again, Americo upset a far more experienced rival by knocking the South Korean out in round eight to win the OPBF Super Lightweight title. With these two upset wins, Americo became ranked by the WBC in the Super Lightweight division and got the world title chance that Mo-Koo was expected to receive next.
Next, Americo challenged the world traveling, WBC world Super Lightweight champion Saoul Mamby. Mamby had fought in Puerto Rico, Canada, Jamaica, Venezuela, the Dominican Republic, Thailand, France, Curacao and South Korea besides fights in his native United States (he would later also fight in Nigeria, Mexico, Guyana, Spain, Zambia and the Cayman Islands as well). Mamby was 30-12-5 with 14 knockouts coming into their bout, compared to Americo's 2-0 with one knockout. Mamby-Americo was the first world title fight ever held in Indonesia. The bout was held on August 29, 1981, exactly 1 year and 2 weeks after Americo's prior fight. It took place at Jakarta's Bung Karno Stadium. After 15 torrid rounds, Americo did enough to have Japanese judge Takeo Ugo score the bout a draw at 146-146, but lost on the scorecards of Italian Marcello Berlini by 147-139 and Mexican-American Rudy Ortega by 146-141, therefore losing the fight by a majority decision.