Liverpool assistant manager Pep Lijnders says a rivalry with Manchester City must remain respectful as they prepare to meet in the Carabao Cup.
The Reds travel to Etihad Stadium in Thursday's fourth round in their first competitive game since the World Cup.
Recent meetings between the Premier League sides have witnessed unsavoury incidents from both sets of fans.
"We need emotion from the stands and we need to feel these games matter," said Lijnders.
"The only problem with emotion is when there's no respect. Then it becomes really hard."
City boss Pep Guardiola said coins had been thrown at him during October's Premier League game at Anfield.