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 30goals 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.
The paper says Shearer has had tests to examine how heading the ball has affected his brain.
"They were pretty nerve-wracking. I have got a terrible memory. I don't know if that is because I don't listen but I have got a poor memory.
"When you play football as a professional you expect in later life you are going to have problems with your knees, your ankles or your back like I have.