Donnie Liboon Nietes (born May 12, 1982) is a Filipino professional boxer. He is a world champion in four weight-classes, having previously held the WBO mini-flyweight title from 2007 to 2011; the WBO and The Ring magazine junior-flyweight titles between 2011 and 2016; IBF flyweight title from 2017 to 2018; and the WBO junior-bantamweight title from 2018 to 2019. He is the longest-reigning Filipino boxing world champion, surpassing in 2014 the record set in 1967 by Boxing Hall of Fame inductee Gabriel "Flash" Elorde. He was one of the first three Asian fighters with world titles in at least four weight classes alongside fellow Filipinos Manny Pacquiao and Nonito Donaire. Nickname Regarding how Nietes got his nickname "Ahas" which is Tagalog for "snake," Tony Aldeguer states: Professional career Early years Nietes worked as a utility man at the now-disbanded Antonio Lopez Aldeguer (ALA) boxing gym before taking up boxing after being encouraged by the practitioners with whom he socialized. In 2003, at the age of 20, Nietes started his career as a professional boxer. On, May 22, 2004, he won the Philippines Boxing Federation (PBF) light flyweight title against Joseph Villasis via first-round technical knockout. Nietes was undefeated before losing in his bout against Angky Angkota via 10-round split decision on September 28, 2004. Angkota weighed in six pounds over the weight limit for this fight. On November 24, 2006, Nietes won the vacant WBO Asia Pacific Minimumweight Title against Heri Amol of Indonesia via second-round knockout. He defended the title twice against Thai boxers Thongthailek Sor Tanapinyo and Sakulpan Pakdee Gym prior to world title fights in minimumweight division. Minimumweight On September 30, 2007, Nietes fought then undefeated Pornsawarn Kratingdaenggym of Thailand for the vacant WBO Minimumweight World Title in Waterfront-Cebu City Hotel, Cebu City, Philippines. Although Nietes floored Kratingdaenggym in the fourth round, the Thai boxer managed to get up and last until the final bell. The bout ended in a unanimous decision in favor of Nietes. Three times, Nietes has been pitted with fighters against whom he was supposed to defend his title, however, all plans have fallen through for undisclosed reasons. Because of this, he was at risk of being stripped off his belt, as WBO rules state that a champion has to defend his title within a year. After 11 months of inactivity, he finally defended his crown, against Eddy Castro (12-3-1) on August 30,