Felix Mourinho, the father of Manchester United manager Jose, has died in Portugal at the age of 79.
"Belenenses confirmed his death on twitter, offering 'heartfelt condolences to the family of Felix Mourinho, father of coach Jose".
Mourinho posted a touching photo to Instagram in tribute to his late father.
Felix also had a 20-year spell in management, coaching - among others - both of his former clubs, Rio Ave and Leiria, who his son would go on to manage himself.
A young Jose Mourinho with his footballing father, Jose Mourinho snr.
Mueller and Comey not as close as Trump and others suggest
Trump said that he never made tapes of his private conversations with Comey - doubling down on a tweet he'd sent a day earlier . The president's tweets on Thursday left open the possibility that the conversations may have been taped without his knowledge.
Felix Mourinho helped Setubal to victory in the Portuguese Cup final in 1965, beating powerhouse Benfica 3-1.
Portuguese media report the funeral is due to take place on Tuesday.
Felix, has been suffering from ill health for several months, died in Setubal on Sunday and will be buried on Tuesday.
During his son's second period at Chelsea, Felix Mourinho was reportedly in and out of hospital and was rushed into care after suffering from a bout of pneumonia last June.