The Portuguese has been linked with a return to Chelsea at the end of the season, with Paris Saint-Germain also touted as another possible destination, and Manuel Alvarez's claims will now add weight to those rumours.
The Canillas chief has pleaded with Blancos president Florentino Perez to keep Mourinho on board beyond the end of the campaign and suggested that the former Inter boss' departure would have a detrimental effect on La Liga."Mourinho told us that next year he won't be able to come and give a talk to the coaches because he won't be here," the Canillas president told COPE Deportes.
"If Mou goes it will be a big loss to Spanish football. I hope Florentino sorts it out."
In 2011, Mourinho donated €10,000 to Canillas to help save them from going under financially and has developed strong emotional ties with the club.
The ex-Porto boss has taken Madrid to the Copa del Rey final and has guided them to the Champions League semi-finals where they will play Borussia Dortmund for a spot in the Wembley final in May.
The Portuguese coach has been unable to defend the Liga title his side emphatically took away from Barcelona last season, however, and the club trail their arch-rivals by 13 points with seven games to go.
His relationship with Iker Casillas and a number of other Madrid veterans has also come under scrutiny and rumours continue to build that he will leave the Bernabeu in the summer - regardless of whether he bags another two trophies this season.