TMZ: Mayweather vs. McGregor is official, 12 rounds boxing

TMZ.com - TMZ Sports spoke with Dana White who says the fight will be a 12 round boxing match. Both guys will use 10 ounce gloves.

The fight will take place at the T-Mobile Arena. Ticket prices have not been set yet.

There WILL be an undercard -- it will be boxing and Mayweather Promotions will handle the matchmaking.

We asked Dana if there was a possibility Roy Jones Jr. will fight Anderson Silva -- he told us, "I highly doubt it."

Both Floyd and Conor will be tested by USADA for performance enhancing drugs.

Dana says he expects Conor to make around $100 million for the fight but wouldn't break down the financials.

Dana says he spoke with Conor Wednesday morning -- he's VERY excited. Conor also believes with all his heart he will knock Mayweather out.

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