Sports betting experts have been stewing over who to select in the upcoming September 19 clash between Floyd Mayweather vs Juan Manuel Marquez. As the old adage goes, styles make fights, and this tilt certainly presents a pleasant potpourri of differing boxing ideologies.

In as many ways as one can imagine, these two fighters are entirely different.

Mayweather is one of the greatest defensive boxers to ever strap on a set of gloves, while Marquez is a fearsome knockout puncher and aggressor. Mayweather lives a flashy Las Vegas lifestyle, as opposed to Marquez’s modest digs in the mountains of Mexico City. Mayweather is comfortable at 147 pounds, and Marquez generally resides around 130 pounds.

The list could go on and on, but one thing both men have in common is a wave of controversy coming out of their respective camps—with one set of news being particularly troubling for those betting on boxing.

A recent report has suggested that the morale and confidence level in the Marquez camp are at an all-time low. Trainer Nacho Beristain has made several questionable statements about Marquez’s physical condition, and chances in the upcoming fight.

“Marquez was in desperate need of a certain type of sparring partner, there was nobody we liked here,” Berestain told the New York Examiner in July.

Apparently, the mood has worsened, leading some reporters to liken the training camp to a convict waiting for his execution.

Marquez, who is already an underdog at BetUS (+325 to -450), isn’t looking like a wise sports betting selection at the moment. The craft Mexican comes in with the size disadvantage already, not to mention having to concede on issues such as ring size to Mayweather Promotions, who will take the lead for this event.

The uncertainty in the camp also makes bettors think even harder about the other issues Marquez already has, such as his vulnerability to cuts. Mayweather is such an accurate puncher that he is able to both open up and target gashes to perfection, which is a dangerous combo for a bleeder like Marquez. In addition, the Mexican warrior will have to beef up in order to take part in the fight, possibly negating the tremendous speed he carried at lower weight classes.

At this point, it appears that those betting on boxing should look at the favorite on boxing lines and choose Floyd Mayweather to work his magic once again at the MGM Grand.