MANILA, Philippines -- Undefeated junior welterweight champion Timothy Bradley Jr. has the tools to not only give Manny Pacquiao a strong challenge, but also to prepare him for a bout against Floyd Mayweather Jr., according to Bradley's trainer Joel Diaz.

In an interview with Examiner, Diaz said Bradley (28-0, 12 KOs) was an obvious choice for Pacquiao if the Filipino boxer wants to prepare for a fight against the unbeaten Mayweather.

"Common sense. If you want to prepare Manny Pacquiao for a fight with Floyd Mayweather, the candidate is Tim Bradley, (who is) fast, undefeated, young fighter," Diaz said.

Diaz does not believe that Pacquiao and Mayweather will fight anytime soon, and added that "Team Bradley is on standby."

"I think the best possible offer would be us fighting Manny Pacquiao sometime in April or May," he added.

Bradley is included in the list of potential opponents for Pacquiao. Also included are Juan Manuel Marquez, Miguel Cotto and Lamont Peterson, but Diaz said his fighter was the best option for the Filipino boxer.

"It makes no sense bringing up Peterson. Don't get me wrong, he really earned the spot up there after beating (Amir) Khan. But Bradley beat Peterson," Diaz said.

As for a fourth Pacquiao-Marquez fight, Diaz said there was no point to it as the boxing public have already seen the two boxers battle three times. "I know if they fight, it will be a similar fight like the third one," he said.

Diaz also believes that Pacquiao will only give Cotto "another beating" if the two boxers figure in a rematch.

Diaz added that Bradley has earned the right to fight Pacquiao by virtue of his undefeated record. The trainer is also confident that Bradley can pull off an upset against the Filipino icon.

"Who knows, if we set up a good plan, and we walk in that ring physically and mentally well-prepared, who knows, with a good plan, we can beat Manny Pacquiao," Diaz said.

"Timothy might not have the power to hurt Manny Pacquiao, but he has the skills and the ability to maybe outbox him," he added.