The details of the deal have not been revealed by either side, but reports suggest the Serie A outfit paid a fee in the region of 13.5 million euros to land the Copa Sudamericana top goalscorer.
"I would like to officially announce we have signed [Eduardo] Vargas," Aurelio De Laurentiis told Radio Marte. "A few minutes ago, I was called by doctor De Nicola, who visited the player and gave a green light about his physical shape. We have signed the contracts, and we have beaten competition from very strong clubs to sign the player. This is evidence that we are always on the lookout for young talents from around the world who can help improve our squad."