Napoli coach Walter Mazzarri has warned his players not to try saving themselves for next week's Champions League clash with Chelsea, otherwise they will find themselves warming the bench.
Inconsistent Napoli travel to Fiorentina on Friday in their last match before hosting the English Premier League heavyweights on Tuesday.
"I will try to install the necessary adrenaline in my players," said Mazzarri.
"It's not easy when you play twice a week to always have the right animation. These are important tests ahead of Chelsea, no-one can afford to mess up their performance otherwise their Champions League place will be at risk."
Looking ahead to the Fiorentina match, Mazzarri says Napoli cannot take Fiorentina lightly.
"It will be a very difficult match, they've just beaten Udinese and Siena and have got 21 points out of the last 28," he said.
"It will be a very tactical game. The team with the more motivated players will prevail."