"Manny Pacquiao got a lot of hurdles to get over to get to (me)," Mayweather said in an interview with CBS Sports during the Final Four of the 2013 NCAA men's basketball tournament.
"He just got two back-to-back losses," he pointed out.
Pacquiao suffered a controversial split decision defeat to American Timothy Bradley Jr. in June 2012, and then was brutally knocked out by Mexican rival Juan Manuel Marquez when they faced off for the fourth time in December 2012.
Negotiations for a fight between Mayweather and Pacquiao have broken down repeatedly over the past few years as neither side can ever come to an agreement.
But the American boxer insisted that he is only asking for one thing from Pacquiao.
"Only thing I was asking for was random blood and urine testing, just to show the world that the sport of boxing is a clean sport," Mayweather said.
Pacquiao has already agreed to random blood and urine testing, but early last year, talks broke down again after the two camps failed to agree on the revenue sharing.
While Pacquiao has yet to return to the ring following his devastating loss to Marquez, Mayweather is set to fight again on May 4.
He will face dangerous welterweight Robert "The Ghost" Guerrero, whom he called a "solid, tough competitor."
"He's strong, he's solid. We'll just see what he brings to the table on May 4th," Mayweather said.
source: abs-cbnnews.com
