The Napoli team started their campaign in the new season of the Italian football league by beating their host Parma 2-0 on Sunday in the first round of the competition, which also witnessed Genoa's victory over its guest Crotone 4-1.
Thus Genoa occupies the top of the standings temporarily by goal difference from second-placed Napoli, and each has 3 points.
Napoli dominated the game in the first half, but without real chances on the home side.
Napoli decided the victory in the second half, as Belgian Dries Mertens advanced with a goal in the 64th minute, taking advantage of the wrong distance of the ball by Parma defender Simone Jacoboni.
Lorenzo Insigne added the second goal for Napoli in the 77th minute, with a powerful shot that Parma goalkeeper Luigi Sibi could not handle.
Genoa won a big 4-1 at home to Crotone at the start of his career in the championship this season.
Genoa advanced early through Mattia Destro in the seventh minute, before teammate Goran Pandev added the second goal in the tenth minute, but Emmanuel Riveri narrowed the difference by scoring a goal for Croton in the 28th minute.
David Zappacosta re-scored the two goals by scoring the third goal for Genoa in the 34th minute, while Marco Piazza made sure to score the fourth goal in the 75th minute.