Arsene Wenger claims the long-term quality of coaching is under threat because of a high turnover of coaches.
The Arsenal boss said : “If you want quality people in any job, you need to give them time to develop,”.
“[Coaches] need time to become good or people with the quality will not come into our job anymore.”
Wenger, who has been with Arsenal since 1996, added: “The average (job life) expectancy at an English professional club, at the moment, is 11 months, and that is quite unstable.
“Every guy who is married, has a family, will have a big hesitancy before he goes into that game.
“That means the quality of the coaching and the quality of the managing is under threat.”