Marino made his comments after Napoli secured a narrow 3-2 win against Pisa on Monday night.
He noted that he has seen two different Napoli teams in recent games, with the Manchester City match having a significant impact on their performance.
Marino also acknowledged that the defeat to Manchester City had an emotional effect on him, but he takes comfort in knowing that other top teams, like Juventus and Inter, have also struggled this season.
He highlighted that AC Milan has shown promise in their recent match against Udinese, but Marino believes that Napoli has the potential to match their level of performance.
Marino specifically praised Spinazzola, saying that he has been impressed by the player's individual technique and skill since last season.
Marino noted that Spinazzola's assist in the match against Pisa was similar to one he provided in a previous match, and he believes that the player is often underrated.
