Filipino boxing icon Manny "Pacman" Pacquiao is looking forward to his upcoming bout against unbeaten American Timothy Bradley Jr. because it will pit a champion against a champion.

Pacquiao will defend his World Boxing Organization (WBO) welterweight championship against Bradley, who also holds the WBO's light welterweight belt.

"Timothy Bradley is undefeated and hungry," Pacquiao was quoted by PhilBoxing in the pre-fight press conference at the Beverly Hills Hotel.

"He does not know how to lose. This will be a great fight: champion vs champion," he added.

Bradley is undefeated through his first 28 career bouts, with 12 of his wins coming by knockout.

He most recently defeated Cuban veteran Joel Casamayor in the main undercard bout of Pacquiao's trilogy match against Juan Manuel Marquez.

Pacquiao, meanwhile, defeated Marquez in that match via a controversial majority decision.

Bradley, who will be moving up to the welterweight division for the bout, is confident despite being the underdog.

"I have always been an underdog all of my life, but I know how to win," Bradley said. "I talk winning. I go to the ring and win."

"After I win, the rematch will be in November," he guaranteed.