Though Napoli went onto win the game at the San Paolo 3-2 after Lorenzo Insigne scored the victor, Juventus progress to the Copa Italia final, claiming victory 5-4 on aggregate.
Gonzalo Higuain scored twice against his old side to ensure Juve made it to the final for the third year in a row, progressing 5-4 on aggregate after a chaotic match, but Napoli beat Juventus for the first time in four attempts this season. "There's a bit of bitterness for those 20 seconds in Turin, two instances in which we weren't lucky and which changed the situation, but the impression is that, bit by bit, we're getting closer and at least we have the satisfaction of having put them in difficulty".
Despite pocketing a healthy profit when he sold Higuain to Juve for an Italian record transfer fee of 90 million euros ($96 million), De Laurentiis said the Argentine had "betrayed" Napoli.
Napoli also hosted Juventus at the Stadio San Paolo in round 30 of Serie A, with anti-Higuain whistles being distributed outside the stadium beforehand. "What's important is that he scores".
Juventus, which leads Serie A by six points, is on course for a third consecutive league and cup double.
Higuain, who left for Juve in a €90million deal last July, was booed throughout by the home support and was confronted on the pitch by one fan brandishing a Napoli scarf.
Tomas Rincon should have made the tie safe for Juve on the half-hour mark but, when presented with a simple opening by a awful Vlad Chiriches backpass, he somehow blazed over the crossbar.
But it was Napoli who created the first big chance after 11 minutes as Arkadiusz Milik's backheel freed Lorenzo Insigne in the left side of the penalty area.
Just watch as Mertens jogs onto the pitch before bursting into the Juventus box to close down Neto, with the goalkeeper's awful touch allowing the substitute to steal in and level the score at 2-2.
Stefano Sturaro laid the ball off to the Napoli favourite, who took a touch to set himself and bent an unstoppable low shot into Reina's bottom-right corner.