Former Napoli striker Roberto Sosa has advised the Azzurri to sign Lamela.
"Napoli and Argentines have a special relationship," the South American pundit told Radio Kiss Kiss.
"The dream is Lamela of River. He is 19 and if you offer a little bit more than he is worth then you can sign him.
"He is a really strong player who has understood at River what it is like to play under real pressure. He's been in a relegation battle this season, but the boy reacted well.
"Erik is irresistible with the ball at his feet and in a couple of years he will be worth three times the amount he is now."