Anyone who knows anything about boxing knew that Mayweather was not going to retire at 49..

Unbeaten boxer Floyd Mayweather will fight UFC lightweight champion Conor McGregor in a much-discussed boxing match on Aug. 26 in Las Vegas, a well-placed source told Yahoo Sports on Wednesday.

Mayweather and McGregor both confirmed the fight on social media on Wednesday.

According to UFC president Dana White, the fight will be at T-Mobile Arena in Las Vegas and will be contested at 154 pounds. It will be a standard, 12-round boxing match with 10-ounce gloves. The Nevada Athletic Commission on Wednesday approved the request from Mayweather Promotions to put on a boxing card on Aug. 26 at the MGM Grand. The venue could change, however, to T-Mobile.