Ronald de Boer believes his brother Frank would be the ideal coach for Everton's John Stones because of similarities in their playing styles.
Everton's defence was a major factor in the team's struggles that culminated in the sacking of manager Roberto Martinez, creating the managerial vacancy with which Frank de Boer - until recently at Ajax - has been linked.
As a player, Frank de Boer was a classy central defender known for his passing ability.
Having played alongside Frank for much of his career, twin brother Ronald knows how he would shape Stones, and is convinced the England international would thrive under him.
"Frank was a type like Stones," said De Boer. "My brother never kicked the ball in the stands: never did it in his life, always trying to have a solution.
"Stones is the same and that is why he sometimes makes mistakes but that is also why people like him. Frank can help him to get better, with his 112 caps and so many trophies.
"Frank would never choose a player who's just defending, he would like to have a guy like Stones. Frank gets crazy if somebody kicks the ball out."
Ronald de Boer recognises Stones' talent requires polishing but he is adamant it would be a mistake to change his game, believing he would be more appreciated on the continent.
"He has to realise when to take risks or not, but you must never take away his qualities," he said.
"People like him because of what he did. If he now changes his game, he wouldn't be that special, because he can defend, but what makes him so exciting is that he can play from the back.
"Pep Guardiola would probably love him, a player like that, who also never kicks a ball into the stands. They want players like that.
"We like that [elsewhere in Europe]. But I think it will come, they will appreciate him in England. Maybe he'll play for England, have a great European Championship. He has great potential."