Jose Mourinho tried to sign Alvaro Morata during the summer, as Chelsea also showed interest in the 25-year-old.
While Mourinho ended up with Romelu Lukaku, Chelsea ended up signing Morata.
Morata has revealed that Mourinho still keeps in touch with him.
“I have a good relationship with Jose,” said Morata.
“He was my first coach in professional football and he gave me the chance to be a professional. He made me the first contract.”
After admitting that they still have a relationship, Morata admitted that the Manchester United boss will be his rival on Sunday evening.
“Sometimes we send messages but not speaking about football, asking if everything’s OK and some jokes.
“It’s good and I appreciate these things because he was my first coach but now he’s – not my enemy – my rival.”