James DeGale says that he can not afford to switch off for one second when he takes on super-middleweight rival Badou Jack.
The IBF super-middleweight champion DeGale (23-1) will face WBC champion Jack (20-1-2) in a unification showdown on Sunday morning at the Barclays Center, New York, live on Sky Sports.
DeGale believes that he is destined to become the unified champion and No 1 super-middleweight in the world, but the 30-year-old Londoner knows that he can not afford to switch off when in the ring.
Speaking to Sky Sports News HQ after Thursday's press conference, he said: "This is the big one now, the fight I've been craving for a while. Jack is a very good and improved fighter, but this is one I'm expecting to win.
"I've taken it to another level in camp and am feeling great, you're going to see that on fight night.
"I'm not thinking that I'm too good for Jack, but the way I've been in sparring and training, it's all gone right for me.
"I need to be fully focused and concentrate for 12 rounds and then I will be the unified champ. I can't switch off. If I think for any moment that I can lay on the ropes or take rounds off then I will lose.
"I'm boxing at the Barclays Center, New York, a fantastic boxing city - this is one of my dreams. I am a buzz fighter and I feel something different inside for this fight, like I felt against [Andre] Dirrell. This is my time, I'm destined to be big and be the unified world champ."
Watch James DeGale v Badou Jack in a unification fight from the Barclays Center, New York, live on Sky Sports 1, 2am, Sunday, January 15.