The Colombian international has joined the high-flying Azzurri after a deal was done with Udinese this week.
"I'm happy, I can finally play in the same team as Cavani," he told the Corriere dello Sport after a summer move failed to materialise.
"I've followed Napoli's games this season, they are doing some great things and having a good championship.
"I'll now need time to get to know the Coach, but the Napoli players have spoken well of him," he added.
"I'm at his total disposal and I'll await to hear what he wants from me on the field of play."