Former England captain Alan Shearer fears he may be at risk of dementia due to heading footballs during his playing days.
The 47-year-old is the Premier League's record scorer with 260 goals and enjoyed an 18-year career with Southampton, Blackburn Rovers and hometown club Newcastle United.
He also netted 30 goals in 63 appearances for England but the Match of the Day pundit has revealed he has concerns over his long-term health.
"For every goal I scored with a header during a game, I must have practised it 1000 times in training," Shearer told the Daily Mirror.
"That must put me at risk if there is a link."