UFC megastar Conor McGregor made his professional boxing debut back in 2017. The Ireland native faced off against Floyd Mayweather Jr. inside the squared circle for the year's most highly anticipated sporting event. McGregor ultimately suffered a tenth round TKO loss, but still earned the payday of his career at a staggering total of an estimated $100 million. Meanwhile, "Money" Mayweather is expected to have pulled as high a $300 million from the match up. After submitting Conor McGregor back at UFC 229, UFC lightweight champion Khabib Nurmagomedov went on to challenge Floyd Mayweather Jr. inside the squared circle. Speaking to TMZ Sports, "Money" Mayweather has gone on to explain that he believes the potential match up could earn over $100 million more than his fight against Conor McGregor. “… When I face Khabib, I’m getting a nine-figure payday. It’s more than the McGregor fight – probably $100 million more, guaranteed. It could be somewhere between $110 (million) and $200 million (more) guaranteed.” For more MMA news click here.