Even though the potential blockbuster fight between Floyd Mayweather and Conor McGregor isn't finalized yet, Las Vegas sportsbooks have already taken some big-time bets on the bout.

According to ESPN.com's David Purdum, the SuperBook has taken more than $10,000 in bets on the fight with Mayweather installed as a -900 favorite and McGregor sitting as a +700 underdog.

Most of the money has been placed on McGregor thus far, including 40 of the first 42 bets at SuperBook.

Jimmy Vaccaro of the South Point revealed that every bet at his sportsbook has been on McGregor.

According to Purdum, SuperBook assistant manager Jeff Sherman didn't expect an unofficial fight to generate so much interest: "Most fights that are not official don't garner much handle until officially becoming announced. I'm not surprised by the McGregor support, just that it has come without an official fight announcement."

As part of the betting stipulations laid out by SuperBook, the fight must be a boxing match and must take place by May 13, 2018, in order for the bets to count.

Both Mayweather and McGregor have publicly stated their desire to make the fight happen due largely to how lucrative it would be.

In April, UFC President Dana White said he believes the fight will happen even though it's not close to finalization, per Mike Bohn of MMAJunkie.com.

Mayweather is a perfect 49-0 as a boxer but hasn't fought since retiring after a unanimous-decision victory over Andre Berto in 2015.

McGregor is the reigning UFC lightweight champion with an MMA record of 21-3, but he has no professional boxing experience.