Conor McGregor's boxing career may not be getting off to a good start after rumours have surfaced about his inefficiency during sparring sessions.

To put it plainly, McGregor is pacing toward a 100 million US dollars payday, but he may have to take a beating to collect his check.

Former world boxing champions Jessie Vargas and Brandon Rios claim that McGregor had already been "knocked out in sparring" in preparation for the bout.

Forbes reports that everyone who has sparred with McGregor–who has spoken about their experience–has come away less than impressed with the UFC lightweight champion.

The lack of boxing experience will likely make this a one‑sided exhibition that favors Mayweather.

The fight will be held on August 27th.

_{There is no actual footage on the rumoured sparring session but if you ever wondered how Conor McGregor (Blue Gloves) performs in a ring, the above video will show you..}