Gael Clichy says working with Manchester City boss Pep Guardiola transformed his game.
Clichy spent six years with City, spending less than 12 months under Guardiola.
He told Blick: "Guardiola changed my idea of football in 10 months.
"To understand it, you have to experience it yourself. Guardiola is a very meticulous person. Josep personifies the words that the game depends on the little things.
"He is very meticulous and pays attention to detail seven days a week, which allows each player to improve."