Pat Nevin analysis: How Mourinho devised 'genius' defence

BBC football expert Pat Nevin explains why Jose Mourinho's philosophy on defending has been integral to Chelsea's Premier League title success this season, just as it was during his first spell in charge of the Blues ten years ago.

Mourinho's team were crowned champions after beating Crystal Palace 1-0 at Stamford Bridge on Sunday, and have conceded 27 goals so far this season.