Arkadiusz Milik made an immediate impact as a substitute, scoring just seconds after coming on in the 83rd minute to secure victory for Juventus at the Stadio Olimpico.
In the first leg, Lazio’s Valentin Castellanos scored a header after 12 minutes, and then added another goal three minutes into the second half.
Despite losing the second leg 2-1, Juventus advanced to the next round.
Lazio had hope of turning the tie around after Castellanos scored from a corner, making it 2-0 on the night and level on aggregate.
However, Milik’s goal ensured Juventus’ place in the final against either Fiorentina or Atalanta.