Floyd Mayweather has been called "big brother" by Adrien Broner many times in the past, but the 37-year-old Mayweather continues to point out flaws about Broner's mentality and preparation whenever asked. Maybe that's really a big brother thing to do.

After praising Marcos Maidana's December win over Broner, which gave Maidana a May 3 date with Floyd, Mayweather said that he'd tried to warn Broner to focus more and to prepare himself for tougher fights:

"I tried to tell him about certain moves he needs to make in certain fights. And then he asks me a question and I'm telling him or I'm teaching him different moves - he says 'naw big brother, I got it, I got it.' And I said 'listen to me, it's different at this level. The way that you're shining on D-level fighters and C-level fighters, you're not going to be able to do that to A and B-level fighters."

Mayweather has never taken opponents lightly, and his dedication to his craft has never been questioned. If you're looking for the true biggest difference between he and Broner, that would be it. Broner has had weight issues, has shown himself to be overconfident a few times now, and has had trouble with Maidana (a loss), Paulie Malignaggi, and Daniel Ponce De Leon, two fights that arguably should have been losses.

Do you think Broner will ever learn, or have we seen him be about as good as he's going to get? Will the loss to Maidana wake him up when it comes to training habits and his approach to fights?