Floyd Mayweather Jr. ranks himself as No. 1 all-time boxer, four notches above Muhammad Ali

Floyd Mayweather Jr. has made no secret of the fact that he thinks he’s a better boxer than Muhammad Ali was.

But just how much better? Mayweather made that pretty clear in a Monday appearance on ESPN Deportes, during which he was asked to rank the top five all-time boxers out of a pre-chosen list of 10.

After stating that “we’re not going to be biased,” Mayweather went on to choose himself as No. 1, giving a list of reasons so long that he finally was interrupted by a host asking why Ali didn’t get the top spot.

“Muhammad Ali lost to Leon Spinks and Leon Spinks only had seven fights when he beat him,” Mayweather explained.

The 49-0 boxer, who has said he will retire after facing Andre Berto next month, went on to reveal the rest of his top five -- and didn’t get to Ali until the bottom of the list, placing Roberto Duran, Pernell Whitaker and Julio Cesar Chavez ahead of the man known as “The Greatest.”

“Muhammad Ali, he was only at one weight class and Ali really lost all three times to Ken Norton,” Mayweather said.

But Mayweather did go out of his way to pay respect to Ali outside of the ring.

“Ali was the greatest for standing up in an era where black people didn’t stand up for each other,” he said.