The former left back has witnessed his compatriot make remarkable changes on a human level after being appointed as los Blancos boss.
Zinedine Zidane is a different person now that he has become coach of Real Madrid, according to Bixente Lizarazu.
Zidane spent five years at the Santiago Bernabeu as a player, during which time he won one La Liga title in 2003 as well as the Champions League in 2002, scoring a historic volley in the final at Hampden Park.
The former midfielder then rose through the ranks of the club, starting in charge of Madrid's Castilla side for 18 months before being promoted to the top job in January following the departure of Rafael Benitez.