Amir Khan maintains he can defy the odds and defeat Saul 'Canelo' Alvarez in their world title showdown in Las Vegas in May.
Khan is moving up two weight classes to fight for the 25-year-old's WBC middleweight title, at a catchweight of 155lb, and is confident he can inflict only a second professional defeat on the Mexican fighter.
Former two-time world champion Khan said: "I've been in training camp for the past six weeks doing strength and conditioning.
"I felt really strong, too big for my weight class, and I've been killing myself trying to come down in weight. Maybe it turns out that Amir Khan is meant to be a middleweight.
"This is a great opportunity for the world title up against a great fighter. I am ready, and I believe in myself.
"When I got the call from Oscar [De La Hoya] asking, 'How do you feel about fighting Canelo?' I said, 'With my skills, speed and power, I really believe you guys will see something different in this fight.
"Since the Olympic days I want to represent at the highest level. Fans have been supportive and the media have been great. Great Britain is going to take over like we always do. Fans can expect a very exciting fight.
"You have two styles - speed and power and strength and explosiveness. We both have youth, and we both want to fight the best. On May 7 we will be ready for this, and guess what? I am going to win the middleweight world championship."
De La Hoya sees echoes of his own epic battle with Manny Pacquaio in the Nevada showdown, and is promising fireworks at the T-Mobile Arena in two months' time.
He said: "We all know that styles make the fights, and the styles of these two fighters make this event a can't-miss for diehard fans.
"This will be a classic fight of speed vs power. Amir is light-speed hand and footwork. Canelo is strength and presents a solid defence.
"I remember when I was favoured because I was bigger and more powerful. No one ever thought he would win, but we all know what happened in my bout against Manny Pacquaio - he retired me."