Julio Cesar Chavez Jr. will not get the chance to become a world champion again in April, as his fight with reigning World Boxing Council super middleweight champion Badou Jack will not push through.

Chavez is being linked to a possible showdown with Jack for the title on April 30. However, the Mexican boxing superstar will not be ready to face the WBC champ after sustaining a heel injury, BoxingScene reported.

According to Chavez, doctors evaluated his aching left heel and was advised to rest for the next three weeks, which will make him unready to challenge Jack next month. It remains to be seen whether or not the fight will be scheduled to a later date.

WBC president Mauricio Sulaiman told ESPN Deportes that he has already sent a letter to Jack and his camp, asking them about their plans since it has been almost six months since the Sweden native won the title.

"We sent a letter to Jack and his team because it's almost been six months since his last defense and we have to get notification on what he plans to do for his next fight," Sulaiman said via BoxingScene.

But according to Chavez, they are still convinced that the title fight with Jack will just be pushed back to another date -- either in May or June. The 30-year-old former world champion indicated that they just asked to postpone the bout for three weeks to give him enough time to train.

"I'm almost certain that there is an agreement. I just asked for the fight to be postponed three weeks because of the heel, but I hope to return to training very soon," said Chavez, who improved his record to 49-2-1 with a unanimous decision win against Marcos Reyes in July last year.

There are doubts though, if Chavez really injured his heel, with some saying that he is just making an excuse. It is worth noting that Julio Cesar Chavez Sr. recently criticized his son for lack of discipline in training, indicating that Chavez Jr. left training camp.

"If this boy, my son, continues with this lack of discipline, his lack of responsibility ... I'd rather have him retire, that he not fight," Chavez Sr. said via ESPN. "This kid wants to do what he wants, train what he wants, at the time he wants. I'm disappointed of his lack of discipline, his apathy."