Conor McGregor says he wants another crack at Floyd Mayweather -- and with all that he's learned from their first fight, McGregor says he's 100% confident he would get that WIN!
"I would like to rematch him under boxing rules, again," Mayweather said to Tony Robbins during a recent interview ... "and I believe I would win."
"Actually, there I go again with that fake humbleness ... I KNOW I WOULD WIN!"
Yeah, you can hear it in his voice ... McGregor really wants this.