It's a personal challenge and I'm happy to wear the number that has been worn by many stars, like Amancio [Amaro], Juanito, [Emilio] Butragueno, Raul, and Cristiano, of course.
"He has not told me anything, and I've been talking to him", Mariano added.
Mariano re-joined the LaLiga this summer giants after spending a productive season at Lyon, where he scored 21 goals in 42 appearances.
Sevilla were close to signing the striker but Real Madrid swooped in at the 11th hour.More news: Ian Wright's ideal response after Alan Shearer claims Arsenal aren't that good
Meanwhile, Mariano's club mate Marco Asensio has admitted he does not want to finish career with the number 20 shirt.
Madrid are looking to continue their dominance within European football and replace their former star and record-breaker Cristiano Ronaldo.
Instead, just days before the deadline, Los Blancos went out and signed Mariano Diaz from Lyon, leaving Mayoral with no option but to depart if he wanted to see consistent minutes on the pitch. And I said: 'I like the No. 7'. I asked what numbers are free.
"I don't think it matters much". Other people have told me bad things.More news: Isaac Now a Tropical Depression But Rains Still Coming
"Others have told me that I have been fearless and others that I should not have taken it".
"It's a pressure to carry that number, but others have told me that I should not have chosen it".
He also confessed that Real manager Julen Lopetegui's call surprised him, "I didn't have his phone number, I didn't know who it was, I wasn't expecting a call at that moment". I saw them play when I was young.More news: Hamilton likes the look of F1's future cars