The fullback moved to Napoli in a free transfer from Roma this summer.
Spinazzola said at his presentation today: "I chose Napoli because I am convinced that I can still give a lot. This year we can have fun and we can annoy many teams."
On the influence of Napoli coach Antonio Conte in his decision, the fullback also said: "It's been a long time since we had to meet, we've been in touch for a long time. After many years we are here working together and this certainly had as much of an impact on my choice as the team, which is very strong.
"The coach pushes us beyond every limit, even a banal tactical question becomes a mental and physical race. He has concepts that are very valid. If you listen to his words and his ideas they are great concepts."