Being hairier than many of his youthful rivals has given the Premier League 's oldest manager a well - justified swagger .
Complacency has crept in - resulting in the Dutchman overseeing an unforgivable failure of quantity over quality .
Being hairier than many of his youthful rivals has given the Premier League 's oldest manager a well - justified swagger , but complacency has crept in - resulting in the Dutchman overseeing an unforgivable failure of quantity over quality .