Fury, who will make his comeback against Albanian fighter Sefer Seferi in Manchester on June 9, has not fought for two years since outpointing Wladimir Klitschko.

Despite inactivity, the heavyweight is still planning for what he wants to do when he decides to retire for good.

"I had a choice and I chose boxing first but, after boxing, I am going to be a doctor," Fury told the Sun.

"I made that decision a few years ago. I am going to be a doctor and I am going to help people. When I have finished in a few years, I'll still only be in my early 30s. Then I'll study for the next seven years to be a doctor.

"If I'm 40 and a qualified doctor, I'm still a young doctor. That is what I intend to do. I studied very hard at school but I turned to sport because that was my calling -- and I've got to the highest level in that.

"Whatever I put my mind to, I do well. I think doctors and nurses do a fantastic job, they're underpaid and without them we'd be in a lot of trouble."

Fury suffered with his mental health after his victory over Klitschko, and he is using his comeback to encourage others to overcome their own demons.

"Before I was a boxer, but with the trials and tribulations I'm a real person," Fury said at a press conference announcing his return to boxing.

"This isn't just a fight for Tyson Fury, this is a fight for depression, mental health problems. I've been as low as any man can go and as high as any man can go. You can always overcome these problems."