BUENOS AIRES - Estudiantes beat Argentinos Juniors 1-0 in an all-Argentine clash to reach the Copa Sudamericana final on Thursday. Striker Jose Luis Calderon, 38, notched the only goal of the semi-final second leg tie to give Estudiantes a 2-1 aggregate win. Calderon got in front of his marker to head home in the 62nd minute. Argentinos had Franco Quiroga sent off in the 83rd minute for a second bookable offence and Rodrigo Brana of Estudiantes was dismissed in stoppage-time for a late tackle. Estudiantes, captained by Juan Sebastian Veron, will face Brazil's Internacional in the two-leg final. Internacional beat Mexico's Guadalajara 4-0 on Wednesday to complete a 6-0 aggregate win. The tournament is the region's equivalent of the UEFA Cup.