Benitez has reservations over Mourinho for Real Madrid
Mourinho is widely expected to take over from Manuel Pellegrini at the Bernebeu at some point after the Champions League final.
However, the Liverpool boss - who has been repeatedly linked with the Real post himself in the past - is not sure about the impending appointment.
"I know Mourinho has dreamed a lot of coaching Real Madrid but I do not know if he is the right person to train Madrid.
"Pellegrini has done a great job and deserves great respect because he's still coach and it's not pleasant to hear talk about who's going to replace you."