Renica spent six seasons at San Paolo.
“I think Napoli can beat Juventus because we have great players at San Paolo,” Renica told Napoli Magazine.
“However, it would be wrong to think that Juve’s injuries will make it easier.
“Edy Reja is a great coach and this is a special game for them.
“Napoli are on the right track and they have some quality stars like Ezequiel Lavezzi, Fabiano Santacroce and Marek Hamsik who are the spine of the team.”