Policarpo "Poli" Díaz Arevalo (born November 21, 1966), better known simply as Poli Díaz is a former professional boxer. His record is 44-3. In July 1991, he fought for the lightweight world championship against Pernell Whitaker, but was defeated by American boxer in the 12th round.[1] Before this fight, Diaz had 32 wins and 0 losses, and 28 KO's.