LOS ANGELES (AFP) - Never one to talk himself down, Floyd Mayweather declared on Wednesday that he is not just good, he is also better than Muhammad Ali, whom many call "The Greatest".

With just over a week to go before his super fight in Las Vegas against Manny Pacquiao, Mayweather said his flawless record - he has never been beaten - speaks for itself.

"I feel like I have done just as much in the sport as Ali," Mayweather said.

"It is hard for a guy to be like me, still sharp at 38. No disrespect to Ali but I feel like I am the best."

Mayweather pointed out that while Ali lost to the unheralded Leon Spinks in 1978, among others, he has a perfect 47-0 record.

He said he has a solid game plan for the upcoming fight and had made sure not to go overboard.

"I am not going crazy. I know it is the biggest fight in boxing history. I can't approach it like that.

"I don't want to put unnecessary pressure on myself, my thing is to just be Floyd Mayweather."