Canelo Alvarez has withdrawn from a rematch with Gennady Golovkin on May 5th ahead of Nevada State Athletic Commission hearing on April 18.
The Mexican superstar tested positive twice for Clenbuterol in the build-up to training camp and was subsequently investigated by the NSAC - who then filed an official complaint.
"I am truly shocked by what has happened and I lament that this has caused people to have doubts about my integrity. I have always been a clean fighter," Alvarez said in a statement released by Golden Boy Promotions.
Addressing the press, Canelo added: "I am sad and feel powerless that this fight can not happen now. I have nothing to hide. I want to be transparent.
"I will do whatever I need to do to demonstrate I have never (intentionally) taken this substance. I have always operated as a clean fighter. I have always taken clean substances.
"I respect the sport unconditionally and would never do anything to tarnish something I have given so many sacrifices for. It saddens me that people are accusing me of doing something improper.
"From here on out, I will take increased precautions to ensure this will never happen again."
On Golovkin's damning media conference on the situation, the two-weight world champion said: "What Golovkin or his team say does not bother me at all. They're not experts, doctors."
With 'GGG' now set to lose a shed load of cash, the Kazakh puncher will plow on with a May 5th date at the neighboring MGM Grand once the NSAC give approval on Thursday.
Gary 'Spike' O'Sullivan, ironically a stablemate of Canelo at Golden Boy, is the frontrunner to replace the 27 year-old following alternative interest from Demetrius Andrade and several other fighters.
For Canelo, the rebuilding of his reputation will begin in earnest at the Nevada meeting to discuss the case.