Irishman McGregor has been challenging Mayweather to a fight for months but the two have yet to reach terms while both have been doing their part to drum up interest with plenty of back and forth in the media.
“It’s a joke for boxing if that happens,” two-time world champion Canelo Alvarez, who fights fellow Mexican Julio Cesar Chavez Jr. in Las Vegas in May, told Reuters on Tuesday.
Mayweather, who retired in 2015 after compiling a perfect 49-0 record, has said he would require a guaranteed $100 million to make the fight with McGregor happen.
“It is a businessman fight,” Chavez said during Tuesday’s promotion stop in New York for the Cinco de Mayo weekend bout with Alvarez on 6 May. “I like to fight a serious fight.”