The decision angered Saleritana owner Danilo Ervolino, who told Gazzetta dello Sport on Saturday it “sets a very dangerous precedent”.
Ervolino is furious because his team, which is not safe from relegation, has less than a day to prepare for Wednesday’s home match with Fiorentina.
“No one thought about our needs,” Ervolino said.
“The dignity of one team has been crushed in favor of another team… I hope it never happens again.”
With a 17-point lead at the top, Napoli have no chance of winning the league even if it doesn’t come this weekend.