Filipino boxing champ Manny Pacquiao admits that he was a little too relaxed when he prepared for his first fight with Timothy Bradley roughly two years ago. But for their second showdown on April 12 at MGM Grand Garden in Las Vegas, Nev., Pacquiao promises to give his best during training to exact his revenge against the undefeated American fighter.

Pacquiao, who captured world championships in eight different weight classes, believes he really won the last fight with Bradley despite lacking the motivation in the fight.

"I remember last time believing that I won the first fight against Tim Bradley; I thought I was leading after every round," Pacquiao said, according to The Daily Mail. "I thought I won the fight easily, I controlled the fight every round."

"I had a feeling in training camp that he would run from me once he felt my power and he did.. after the third or fourth round," Pacman added. "To be honest, I wasn't as motivated when I was training for our first fight. I guess I didn't take him seriously enough."

Bradley - Different From The Las Time

Bradley said that he's going to be a much different fighter than when he and Pacquiao fought two years ago. Known as the "Desert Storm," Bradley wrested the WBO Welterweight title from Pacquiao after pulling off a split decision win in 2012.

The fight was criticized as one of the most controversial bouts ever officiated, tarnishing the credibility of Bradley as solid pound-for-pound boxer.

However, the American bounced back big with his sensational victories against Russian slugger Ruslan Provodnikov and Juan Manuel Marquez last year.

"When I fought Márquez I knew my quickness would come into play. I set traps and used my quickness. I fought with intelligence. I used my pure boxing skills," Bradley stressed.

"I am a different fighter than the one who fought Pacquiao in our first fight. I am more mature, smarter, and I now listen to what my corner is saying," he added.

Bradley believes that he's going to have an edge over Pacquiao this time around because the Filipino fighter seems to have already lost his killer instinct based on his performance against Brandon Rios last November.

"That's the first thing I noticed in the Rios fight. Every time he backed Rios into a corner, Manny stepped back instead of going for it. He didn't even try to put Rios away. That spoke volumes to me," said Bradley, who remains undefeated in 31 fights.