Fabian Ruiz's fine effort earned Napoli a potentially crucial 1-0 victory over Inter in Wednesday's Coppa Italia semi-final first leg.
The Spain midfielder lit up an otherwise turgid San Siro affair with a finish right out of the top drawer shortly before the hour in Milan.
It proved the decisive moment against an Inter side – playing just three days on from beating Milan in the derby – lacking in creativity and Antonio Conte's men will have to show more in a huge Serie A clash with Lazio on Sunday.