Manny Pacquiao admits beating Floyd Mayweather on May 2 would be the biggest achievement of his glittering career.

Following years of the two camps sparring with each other in public, the pair are now finally set to do battle in Las Vegas early next month in one of the biggest bouts in boxing history.

Although defeats to Juan Manuel Marquez and Timothy Bradley in 2008 and 2009 had led to suggestions of his decline, Pacquiao has fought back in recent outings to prove his doubters wrong.

Beating Mayweather would only add further gloss to a spectacular career that has seen him previously outmanoeuvre the likes of Oscar De La Hoya and Ricky Hatton.

However, it will certainly not be easy, with the American desperate to hold onto his unbeaten record at the MGM Grand, in what is expected to be his penultimate appearance before retiring.

Pac-Man admits he cannot wait to finally get in the ring with his great rival and says a victory would mark the pinnacle of his career.

“I feel very excited for the fight,” he said. “I have a lot of sparring partners that are similar to Floyd’s fighting style, we have done well. We know what to expect.

“My entire career defines my legacy; I have already accomplished great achievements in my career while excelling in different weight divisions.

“This fight is an additional achievement in my career; it’s the biggest fight in boxing history.

“I can say that beating Floyd would be the biggest victory of my career.”

As things stand, Pacquiao is the current 2.75 underdog heading into the fight with Mayweather priced at 1.44 and the draw 23.00.