Heavyweight contender Luis Ortiz has failed a drug test just a month ahead of his WBC heavyweight title bout with Deontay Wilder.
WBC chief Mauricio Sulaiman confirmed that "King Kong" Ortiz had tested positive for a banned substance by Vada.
The Cuban can appeal the Vada ruling, but his highly anticipated November clash with American WBC champion Deontay Wilder is now on hold.
Deontay Wilder (38-0, 37 KOs) is scheduled to make his sixth defense of WBC title against heavyweight contender Luis Ortiz (27-0, 23 KOs, 2 NC) in Brooklyn, New York, on November 4.
The Cuban was the No 1 contender for Anthony Joshua's WBA title, but as AJ opted for the IBF mandatory - Kubrat Pulev, both Ortiz and Wilder had no choice but to wait until next year for a potential Joshua fight.
It is believed that the winner of the Wilder-Oritz bout will face Joshua in a unification bout if the Watford champion beats Kubrat Pulev, of course.
It is not the first time Luis Ortiz is having issues with testing. Back in 2014, he received a nine-month ban for testing positive for a banned substance.
The 38-year-old returned stronger and held the WBA interim title for a brief spell in 2015 and 2016.
Ortiz had issued a warning at "The Bronze Bomber" earlier this week: "Wilder should sign his death sentence. I’m very different than anybody else that he’s fought.
"I punch harder than anybody else. I’m going to teach him not to mess with Cubans.
"I’m ready to go and excited for the fight. I want to get to November 4 so I can do what I have to do.
"Wilder does a lot of talking. He’s nervous and keeps forgetting the date of the fight. I think he took this fight because he has no choice and no one else to fight.
"I think Wilder is going to run in this fight.
"He should be careful what he says before the fight, because I think he’s going to run from me.
"Some skeptics are talking about my age, but look at Mayweather. I still have my speed and my quickness."
Ortiz really seems like the biggest challenge Wilder have ever faced.
The American will be hoping that everything is fine with Ortiz's testing, because it is not the first time he is dealing with such scenario.
Last year, Wilder had to make the fourth defense of his WBC heavyweight title against Alexander Povetkin in Russia. However, a week before the fight, it was reported that Povetkin had tested positive for the banned substance meldonium.
As you can imagine, Twitter is furious with Ortiz for possibly throwing away the fight.
We hope that this time the fight will happen, and we will have the exciting show that both fighters promise to give us.
A clear winner would be number one contender for Anthony Joshua's titles and unification of the division.
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