Top Rank Boxing on Monday released the official promotional video of the Manny Pacquiao-Floyd Mayweather Jr. superfight set May 2 at the MGM Grand Garden Arena in Las Vegas.

The welterweight showdown between the undefeated Mayweather (47-0) and Pacquiao (57-5-2) is seen as the most lucrative ever in boxing.

"This is what you are waiting for since five years ago," said Pacquiao, who has held world titles in eight different weight divisions, said during the official announcement of their fight. "The fight is on and we're very excited ... we will do our best on May 2 to make you happy."

Pacquiao told a group of reporters that he was not worried about the upcoming bout and was more concerned about prior fights with Oscar De La Hoya, Antonio Margarito, Miguel Cotto.

Those fights came when Pacquiao, 36, was closer to his prime. Mayweather, 38, is also closing in on the end of his career and Pacquiao's camp feel that works to their advantage.

"(Mayweather) had a better chance of winning five years ago," said Pacquiao's trainer, Freddie Roach. "He has slowed down. I think Manny knows how to beat him."

There are no shortage of contentious storylines in this matchup. Roach has exchanged words with Mayweather's father and trainer, Floyd Mayweather Sr., while fight promoter Bob Arum used to work with Mayweather instead of Pacquiao before a falling out split the pair.

For me to be in the biggest fight in boxing history ... I kept my fingers crossed and here we are today," said Mayweather. - with a report from Reuters