In the second leg, Oliver Giroud scored in the 43rd minute to give Milan the lead. Before that, Giroud missed a penalty in the 22nd minute.
Napoli missed an opportunity to equalize in the 82nd minute. Napoli’s Kevicha Kevaratkhelia failed to score a penalty in the 82nd minute.
Victor Osimhen scored in injury time to tie the game 1-1, but it did not prevent Napoli from going out of the quarter-finals.
After 16 years, AC Milan, who won the title by defeating Liverpool in 2007, reached the semi-finals of the Champions League.
AC Milan will now play the winner of another Italian club Inter and Portuguese club Venfica in the semi-finals.