The 23-year-old has lauded the current Chelsea boss for providing him with the platform to showcase his ability and earn a four-year contract extension with los Blancos
The 23-year-old recently inked a four-year contract extension with los Blancos having being promoted to the senior squad by the Portuguese last season.
The current Chelsea boss endured a turbulent final year at the Bernabeu, in which he fell out with a number of players towards the end of his three-year stay in the Spanish capital.
However, the 50-year-old seems to have retained the affections of Nacho, who has "only kind words" for the controversial coach.
He told Marca: "I have spent many years fighting to be in the first team and I have finally achieved my dream. Now I must work.
"I have a lot of appreciative and kind words for Mourinho. Thanks to him I have the opportunity to still be here."
The Spain Under-21 international also commented on Zinedine Zidane's transition from sporting director to first team coach.
He added: "He works close with us and communicates well with the players. He is going to bring a lot of experience."