My money is on Mcgregor.

-mcgregor is in the prime of is career.
-mayweather is 40.
-Conor beat the Paulie guy in boxring.
-Mayweather supposedly got knocked out while sparring for the fight.

My bold prediction is mayweather hitting canvas within 3 rounds.
Just look at the difference in their training. It's like mayweather stood still for 2 years.
He literally says he's only back for the money.

Also only x1.22 for mayweather and x5.0 for mcgregor. I know what I'm betting.