When Floyd Mayweather and Conor McGregor head to Las Vegas for their much-anticipated boxing pay-per-view bout on Aug. 26, the expectations for a circus atmosphere and straight cash for the participants will be large.

The 73-day promotion should feature some of the finest trash-talking exchanges combat sports has seen. But outside of the "puncher's chance" element, few are giving McGregor, the UFC's lightweight champion, who has never boxed a single round as an amateur or professional, anything close to resembling a chance.

The intrigue for some in this carnival fight surrounds whether McGregor will attempt to fight dirty and mix in some of his MMA strikes either out of frustration or a mental lapse in the heat of battle.

In order to make sure that doesn't happen, UFC president Dana White confirmed late Wednesday on a media conference call that language was added to the contract, including the kind of financial penalties that are designed to deter such practices.

"Oh yeah, that will not happen," White said. "That will not happen. That is absolutely in the contract, number one, and number two, this is a boxing match under the Nevada State Athletic Commission under the rules of boxing.

"You talk about a guy of Floyd Mayweather's value in the sport, the lawsuit if that ever happened -- Conor likes money and Conor would depart with a lot of money if that ever happened. That will not happen."

The idea that McGregor might save face in a loss by taking Mayweather down or landing a spinning wheel kick to disqualify himself don't appear to be in the cards. And that's probably a good thing.