Mauro Boselli scored twice as four time winners Estudiantes de La Plata of Argentina secured a place in the Copa Libertadores final after beating Nacional 2-1 in Uruguay to complete a 3-1 aggregate win.

After a goalless first half, striker Boselli opened the scoring for Alejandro Sabella's Estudiantes seven minutes after the break following a mistake from defender Alejandro Coates.

Alexander Medina volleyed home 20 minutes later to equalise for the home side, but after goalkeeper Mariano Andujar kept Nacional at bay, Boselli rounded off a swift counterattack to seal the win for Estudiantes in stoppage time.

At the Olimpico Stadium in Porto Alegre on Thursday, Cruzeiro will look to defend a 3-1 first leg lead against fellow Brazilians Gremio to secure their place in the final.

"This squad gave 110% and deserve to be in the final," said Estudiantes coach Sabella.

"Now, we have to prepare well for the finals because Gremio or Cruzeiro will surely be tough opponents."