Henry wrote in
The Sun: 'You will only truly appreciate Rooney when he has retired. It's a shame but it's always like hat.
'I would absolutely urge all those youngsters in the squad, such as Raheem Sterling and Harry Kane, to watch and learn off Rooney from this day onwards.
'They are extremely lucky to be on the same training pitch as this guy and they must make the most of it. It will be a real waste if they do not.
'They must try to copy him. In terms of his dedication and the way he plays. I would also say this to the young lads at Manchester United.
'To play well for six months or a season in football is nothing. To do so for over a decade like Rooney is extraordinary. I know what it takes and it isn't easy.
'Trust me, people talk about him outside of this country. In Spain and France, he is appreciated as a top, top player.'
It's a shame our own fans are incapable of doing the same.