Earlier Giroud had opened the scoring for his team in the 28th minute before Tijjani Reijnders doubled Milan's lead. But the Serie A giants squandered their lead in the second half as Nicola Sansone and Lameck Banda brought the hosts back into the game.
Lecce could have even won the tie as Roberto Piccoli found the back of the net from the free-kick that resulted from Giroud's foul. The team had already started celebrating a dramatic win but VAR cancelled the goal