Foreign coaches take time to understand FA Cup, says José Mourinho

• Manchester United face Blackburn Rovers in fifth round on Sunday
• ‘Not everybody studies and understands the culture of this country,’ he saysJosé Mourinho believes that some foreign coaches fail to understand English football’s culture and this can lead to FA Cup upsets, with Jürgen Klopp’s Liverpool the highest-profile casualty of this year’s competition.Mourinho takes Manchester United to Blackburn Rovers for Sunday’s fifth-round ma