"He loves Real Madrid and hopefully he will lead us again to the victory".
Zidane also won a Liga title in 2017 among nine trophies before standing down having taken the club to the European summit.
"No, of course I'm not disappointed", Mourinho said on El Chiringuito TV.
"Zidane has done magnificent things for the club over the past number of years, so it's ideal for him and flawless for the club".
"For Madrid it is flawless, and for him it is a great opportunity to demonstrate how good he is. And now with a new project, it is fantastic".
Last week, Mourinho denied suggestions he had spoken with Real about taking over.
"I never talked about whether I would want to return to the position and I think, in my opinion, this is a flawless solution".
With Zidane already established as an icon in Madrid, Isco believes the 46-year-old deserves even more recognition for pledging to rebuild the golden empire which has collapsed in his absence.
When asked if Madrid have given him an explanation, Mourinho said: "Why would they need to give me an explanation?"