"Somebody's "0" has got to go", he said, referring to Mayweather's flawless boxing record of 49-0. "This is a very exciting time, and how they were reacting to this, it's going to be a tremendous event for the city (Las Vegas), and the MGM and for the T-Mobile Arena". McGregor's navy blue suit also made quite a statement. And as expected, there was plenty of trash talk exchanged between the two - both verbally and visually - before and after they shared their first official stare down.
'Senior, senior, senior. tell him as long as he speaks my name with respect, I will abide by the boxing rules.
McGregor retorted: "You haven't knocked anyone out in about 20 years".
Mayweather said he had discussed his plans to quit for good at a meeting with advisor Al Haymon earlier Tuesday. On August 26, I'm knocking Conor out. "I'm sure I would have been notified much sooner if there were any real discrepancies right?"
"There's some psychological warfare going on, " McGregor said. "Still got 100 million, and ain't even ever touch this [expletive]". His little legs, his little core, his little head, I am going to knock him out inside four rounds, mark my words.
Leonard Ellerbe, CEO of Mayweather Promotions, said, "Floyd has been a trailblazer his whole career and this event proves that he is still the marquee name in the fight game".
Mayweather would pause in between comments and prowl around the stage - he even began shadow-boxing at one point - a stark difference to the stoic figure he cut while promoting his blockbuster clash with Manny Pacquiao.
"We have to give people what they want to see", the former welterweight king said.
"After taking a couple years off, I was okay but then we end up somehow making this fight happen and now I really know that this is it".
Conor McGregor's suit caught everyone's attention at the press conference held in Los Angeles on July 11.
The media conference was the first in a four-day worldwide tour promoting the bout.