Sin Piedad 2000 (Spanish for "Without pity") was a professional wrestling Pay-Per-View (PPV) produced by Consejo Mundial de Lucha Libre (CMLL), which took place on December 15, 2000 in Arena México, Mexico City, Mexico. The main event of the PPV was a Lucha de Apuesta, hair vs. hair match between Cien Caras and Perro Aguayo. The show also featured a Tag team match for the CMLL World Tag Team Championship where the champions Los Guerreros del Infierno (Rey Bucanero and Último Guerrero) defended the championship against El Hijo del Santo and Negro Casas. The show featured an additional tag team match and three Six-man "Lucha Libre rules" tag team matches.