The quirky secrets of Mikel Arteta's Arsenal revolution: From a 'broken club' to a team 'smarter than Pep's' via training sessions in silence... and pelting players with tennis balls!

Arteta, just 37, had wrestled with some doubts as to whether he was even ready for the move. At City, he had been assistant to Pep Guardiola . This was different. This was big. Arsenal were a mess.