Juve sold the Spain -defender a year ago to Bournemouth, now a Real Madrid player with Huijsen.
Capello said to La Gazzetta Dello Sport: “I am surprised that Juve did not understand the obvious potential of the boy. Huijsen cannot suddenly have become good.
“If he plays for Real Madrid at the age of 20, the more he is a Juve player.”
Capello admits that he is a fan of Juve -midfielder Kenan Yildiz, and adds: “Yildiz? He has quality and humility of a champion: he is a talent on the same footing with Real Madrid. Juventus is equal to him: this could be his game.”
Juve will meet Real Madrid tonight in the club World Cup round of 16.