Floyd Mayweather Jr says his long-awaited bout with Manny Pacquiao in Las Vegas on May 2 is more about leaving a legacy than it is about money.

The 38-year-old, unbeaten in his 47 fights and a five-division world champion, heads into a clash with eight-division title holder Pacquiao that is expected to set financial records - but insists his reputation and the education of his children remain more important to him.

"When you're young, you look at everything like you want nice cars, you want jewelry, you want a big house," Mayweather told mlive.com.

"But once you've been living like that for so long, it's not really about that anymore. It's about my children, the legacy, them getting the best education. That's what's mainly important to me. I don't worry about the fight because I know what I can do and I know what I bring to the table."

On his preparation for the fight, which has included chopping huge blocks of wood as part of his conditioning training, Mayweather added:

"I had to go back to where it all started. I just wanted to. Just for myself. Things just happen and you come up with different ways to gain strength, with the new era. But I had to go back to where it all started from. I like it a lot more. I like it. I appreciate it."