BBC Sport - Pat Nevin analysis: John Stones is unpolished 'diamond'
'Why England must stick with Stones'
- From the section Football
BBC football analyst Pat Nevin examines the reasons why central defenders take longer to mature than players in other positions, and the challenges this poses for managers.
Nevin believes Everton's John Stones is on course to become one of England's best ever centre-backs - despite making some mistakes at club level over the past two seasons.
Pictures courtesy of the Premier League.