كتب : Amro Hassan
The Roman outfit won the first-leg 2-1 in Rome, and goals from Mauro Zarate and Alexandre Kolarov secured their qualification to the final game.
Alessandro Del Piero's second-half strike proved to be no more than a consolation for the home side.
The Old Lady had to finish the tie with ten men after winger Mauro Camoranesi was sent-off on 81 minutes.
Lazio will now face the winner of Inter Milan and Sampdoria, as the Genoa side won the semi-final first-leg 3-0.
The result means that Juve will finish the season empty handed, as the Old Lady are already out of the UEFA Champions League and are trailing ten points behind Serie A leaders Inter.