Kell Brook insists he has no fears about making weight or suffering another eye injury ahead of his super-welterweight debut against Belarus' Sergey Rabchenko in his home city of Sheffield Saturday.
Former IBF world welterweight champion Brook (36-2, 25 KOs) had previously found making the division's weight limit an ordeal which he is glad to be without.
"I believe I've got plenty in the tank for this fight and I'm looking forward to that," Brook told ESPN. "I'm looking forward to being active again because I've had two fights in two years.
"It's a lot more fun at the new weight, it's a lot less worrying especially in the back half of the training camp.
"I know I'm going to make weight now where as before there was not knowing whether I was going to, then you are worried about that ten pound limit -- it takes it out of you.
"It's been nice to have been able to eat more this time and worry less. I'm light and lean."
Broken eye sockets in his past two fights, which put his career in doubt, are perhaps more of a concern -- especially if it happens again.
Brook, 31, lost his welterweight title in an 11th-round defeat to American Errol Spence in May when he suffered a broken left orbital bone. He also fractured his right eye socket in a stoppage defeat to three-belt world middleweight champion Gennady Golovkin in September 2016.
"Of course there are concerns about it, like why did it happen twice?" Brook added. "When the first one went the other one is going to become weaker I've been told.
"But my surgeon, who is called Muhammad Ali, has checked me out and says the bones have healed.
"I've had titanium plates in both eyes so it's mended and I've been sparring with heavier guys and not had any problems. It's only a problem when I go through airports at security."
On paper, Rabchenko (29-2, 22 KOs), 32, represents an easier challenge than Brook's previous two opponents -- both of whom feature in ESPN's top ten pound-for-pound fighters in the world -- but the Englishman insists his former sparring partner will be a difficult test of what he has left.
"I could have gone for someone a bit easier having jumped in with Gennady Golovkin two weight divisions above and then fighting my mandatory who everyone was raving about [Errol Spence]," Brook continued.
"But this guy is ranked highly with the WBC and I've sparred with him a couple of training camps ago. He's clever and a good fighter.
"I've looked at the other champions and it's a very hard division, they are all good champions, but one fight at a time for me because Rabchenko is a serious test."