Napoli are to meet Barca in a playoff.
Zola said, "Although it is no longer Messi's Barcelona, the game remains fascinating.
"It will be a great challenge. Napoli will play great, indeed maybe it will also start with a few more chances."
Zola also declared: "The Scudetto? The Azzurri will play it up to the end with Milan and Inter, but I wouldn't rule out Juventus either, who won an important result in Bergamo."