Zapata had his first training with Napoli this morning after becoming Rafael Benitez's sixth summer signing, turning down interest from Queens Park Rangers and West Ham United to seal a switch to the San Paolo Stadium.
The Colombian forward watched his new teammates start Serie A in style with a 3-0 win over Bologna last night, declaring that he felt an immediate connection with the passionate Azzurri fans.
He told the club's official website: "I experienced the emotion of the San Paolo and the great passion of the fans straight away.
"I thank the club for this opportunity, for me to play for Napoli is a great joy."
The 22-year-old will wear number 91 shirt for Napoli, deciding to match his squad number with the year of his birth.