"I am happy and emotional. Napoli have always been one of the biggest clubs in Italian football. I'm very proud to wear this jersey," Zuniga said.
"Our mission is that of doing well and playing a good championship. We have a competitive squad composed of so many strong players. We can do well. My principal idea is that of confirming how good I showed myself to be in the past with Nacional Medellin and Siena.
"I have the luck of already knowing Italian football. This is important. We hope that it all goes well. Napoli's squad is composed of strong players and a lot of other South Americans who will surely help me adapt quickly in the group.
"What can I say? To play in this stadium will be wonderful. The San Paolo is a ground that can hold a lot of fans.
"[Ezequiel] Lavezzi is a great player capable of inventing some extraordinary plays in every moment of the game."