May’s all Mexican showdown in Las Vegas took a twist last week when Canelo Alvarez and Julio Cesar Chavez Jr sensationally shook on a purse bet.

However, the bet is now void after Julio Cesar Chavez Sr has blocked the agreement that his son Chavez Jr and Canelo made.

Speaking to ESPN Deportes, Chavez Sr revealed: "The truth is, I don't want any money from Canelo. We do not care about that. We care about prestige, we care about glory, we care about pride - and that is the most important thing in this fight.”

Alvarez, who has previously stated Chavez Sr was one of his idols growing up, agreed to call it quits: "I will do it out of respect for you."

Chavez then switched the emphasis on the contest, insisting it’s not all about the money.

"Obviously money is important in a boxer's career. That's what someone is fighting for but there's no need to bet your wages. It is not ethical as a sportsman and people can misinterpret that. In this fight the money is secondary, what matters is the pride and dignity of the fighter."

Both fighters wrapped up their four city media tour in the States to promote the fight which falls on the coveted Cinco de Mayo weekend.

The Hall of Fame fighter is predicting a spectacle come fight night: “Everyone will see a grand, grand fight and the one who will win is the one with the bigger cajones!”