
Tyson Fury claims the world only got to see around "65 percent" of his ability as he dethroned former heavyweight champion Wladimir Klitschko in Germany.
The 27-year-old scored a unanimous points decision over the Ukrainian, who had been undefeated in over a decade, and says he could have gone to 15 rounds with ease.
Fury, who captured the WBA Super, WBO, IBO and IBF titles in Dusseldorf, even went as far as telling Sky Sports News HQ he was unhappy with his performance.
Asked on Sunday morning if his multiple-title win had sunk in yet, Fury said: "Yes, very much so but I don't feel any different than I did yesterday.
"I never got to bed till ten to four [this morning] but I do feel fresh. I feel good, not too sore, a little bit around the eyes and pain inside of my head but not too bad, to be honest, after a 12-round fight with the so-called best fighter on the planet.
"For me that was a bad performance, although it was good enough to win the heavyweight championship of the world and beat a man who had not been beaten in 10,11 years - it wasn't as good as I can do and I have got plenty of people to back that up.
"That was about 60-65 percent of my arsenal last night. I can go up another level as well so I can't wait to get on to the next performance to do even better."
Klitschko has already said he wants to exercise the option of a rematch in the original fight contract but Fury says time will tell if that happens and claims he knew he could get away with taunting the Ukrainian in the ring.
He said: "I think he will take the rematch but it is all right when the blood is going and the adrenaline is pumping, but when he gets home and has a couple of weeks to think about it, he knows that was a one-sided fight last night.
"There were rounds in there I was playing with him, I had my hands behind my back, hands in the air and taunting him the whole way through. I was playing games in there. It was our plan to enjoy the fight from the first bell until as long as it lasted.
"Next time when we do have the rematch, I think it is going to be a much easier fight."