Napoli owner Aurelio De Laurentiis has claimed that Borussia Dortmund is "like a monster with three heads" ahead of the two sides' clash on Wednesday.
The Partenopei begin their Champions League campaign by hosting last season's finalist and their president has admitted his respect for Jurgen Klopp's side.
"Dortmund scare me. They are like a monster with three heads," he told La Gazzetta dello Sport. "They are an extraordinary team who play good football and are very personable.
"Both sets of fans are great, and it will make for a great atmosphere on Wednesday. They need their supporters just as much as we need ours."
De Laurentiis also spoke highly of Dortmund off the pitch, citing the club's business in the transfer market.
"I have been following Dortmund for years - the team, the coach and their moves in the transfer market," he continued. "They are a club who do not waste their money, unlike others."
Napoli currently tops Serie A, having taken maximum points from its opening three games.