The English heavyweight makes his comeback against Sefer Seferi, a 39-year-old Abanian-born Switzerland-based cruiserweight, at Manchester Arena on Saturday.

Undefeated Fury (25-0, 18 KOs), 29, has not boxed since pulling off a big upset points win over Ukraine's Wladimir Klitschko for the WBA, IBF and WBO world titles belts in November 2015.

After problems with drink, drugs and depression, as well as serving a back-dated two-year doping ban after testing positive for the steroid nandrolone in 2015, Fury is back and as confident as ever.

"I am the greatest heavyweight of all time," Fury told reporters on a conference call. "I've not got to be modest. I am the best ever. Me, Tyson Fury, the Gypsy King, the one and only.

"When has there ever been somebody like me? There have been plenty of come-forward aggressors, there have been plenty of boxers off the back foot, but when has there ever been a 6ft 9in switch-hitter with the confidence of Muhammad Ali and Floyd Mayweather rolled into one?

"There has never, ever been anyone like me. I'm unbeaten, I'm fast, I'm brash, I'm young, I'm good-looking, I'm tanned. I've even got white teeth.

"What more could I have? I'm a fighter, I'm a boxer, I'm a sportsman, I'm a showman.

"I am the greatest of my time. This is my era, I've already beaten the lineal champion, I've already beaten the legendary champion Wladimir Klitschko, and guess what, I did it easily. It was an easy fight.

"So put me in the ring with these bums and I will tell you how to put them down -- easy peasy lemon squeezy."

Fury is ambitiously asking promoter Frank Warren for "four or five" fights before the end of 2018, to set up a shot at English rival Anthony Joshua, who holds the same three belts he once held, or American Deontay Wilder, the WBC titleholder.

"You have the lineal champion, the real mac, who has been in exile for nearly three years, just like Muhammad Ali was," Fury said. "Then you have the other guys who have done their thing in the meantime.

"But once I come back, I am back and I will take over again, just like Muhammad Ali did. Nobody gave him a chance and I'm sure all the journalists and boxing pundits around the world are saying I can't do it again.

"I shocked you all the first time and I'm going to shock everybody for a second time, because the way I see it, I am the best there is going to be and I don't believe there has been a man born yet who can beat me.

"You haven't even seen what I can do yet because I haven't had an opponent take me to that level. The better opponent you put in front of me, the better I become.

"I've got a massive opportunity to go down as one of the best heavyweights of all times. I have the dance partners to achieve that in Deontay Wilder, Anthony Joshua and whoever else.

"That's what they will look like when they fight me -- bums."

Joshua (21-0, 20 KOs), 28, and Wilder (40-0, 39 KOs), 32, are in talks to face each other in September, November or February 2019.

Joshua's promoter Eddie Hearn wants the WBA-IBF-WBO champion to fight in September and if it is not Wilder, then it will be WBA mandatory challenger Alexander Povetkin (34-1, 24 KOs), of Russia, in London or Cardiff, in September.

A fight against either is way off for Fury, but that has not stopped the Gypsy King dreaming about potential fights against Joshua or Wilder.

"I can't sleep at night thinking about bums all the time," Fury said.

"I'm thinking about putting my fist through the side of AJ's jaw. I'm thinking about knocking Wilder spark out, all 15 stone of him. Putting him upside down on a heap in the floor.

"And if there are any cruiserweights out there, light-heavyweights or middleweights want to move up, I will give them a good hiding too. Gennady Golovkin, Andre Ward, whoever they are the dons, move up to heavyweight and I will sort them all out."