Arsenal manager Arsene Wenger feels Jose Mourinho showed a lack of respect when the Chelsea manager said 10 years without winning the title must be "very boring".
Some Gunners fans chanted "boring boring Chelsea" during last weekend's goalless draw at the Emirates Stadium, and in his post-match press conference, Chelsea manager Mourinho responded by turning the tables back on Arsenal, saying: "You support the club and you're waiting, waiting, waiting for so many years without a Premier League title, so that's very boring."
Those comments did not sit well with the Arsenal manager, who said: "The biggest thing for a manager is to respect other managers. Some people have to improve on that."
Asked if Mourinho should conduct himself with more dignity, the Arsenal manager answered: "Look, everybody lives with his own internal problems and I live with mine. That's enough."
The 65-year-old, though, believes coaches must eventually put a distance between professional and personal disagreements. He added: "You can have incidents with other managers sometimes. It gets a bit heated when you fight directly with them, but in the end I believe time heals and the important thing is to respect each other as much as you can."