Pacquiao challenged undefeated American boxing champion Floyd Mayweather Jr. to fight him if he thinks he fights like an amateur boxer. Is Pacquiao vs Mayweather on?

Pacquiao dared Mayweather to put his money where his mouth is and fight him for the world to finally know who is the better boxer between them, instead of criticizing and evading him.

Pacquiao told the American boxer his communication line is always open 24/7 for him to call if he wants to face him inside the ring .

Mayweather earlier said that Pacquiao looked like an amateur when he fought against previously undefeated American boxer Timothy Bradley at the MGM Grand in Las Vegas last April.

He said Pacquiao looked sluggish and old, and he looked tired during the fight which had not happened in his past bouts.

The American boxer had further boasted that unlike Pacquiao, he is sharper and stronger.

However, despite his perceived advantage over Pacquiao, Mayweather is still not keen on fighting the Filipino champ since he is from Top Rank and he had no intention talking to his former boxing promotional company.

In previous reports, Mayweather said a fight with Pacquiao is not possible since he only fights boxers who adhere to the US Anti-Doping Agency drug-testing protocol.

Pacquiao used his speed and power to frustrate and eventually beat Bradley. With his win over Bradley, Pacquiao regained the World Boxing Organization welterweight belt.

The Filipino boxing superstar who is set to fight again later this year is still awaiting for his next opponent to be put up by Top Rank. Among the possible opponents of Pacquiao include Mayweather, Mexican boxing superstar Juan Manuel Marquez and Canelo Alvarez.