Anthony Joshua’s heavyweight title fight in June is now in doubt after it was revealed that his opponent Jarrell Miller failed a drugs test last month.
The news was revealed by Eddie Hearn and means that the scheduled clash at Madison Square Garden is now unlikely to go ahead.
A drug test by the Voluntary Anti-Doping Association (VADA) showed than Miller had recorded an adverse finding.
A report by ESPN’s Dan Rafael, stated that Miller has tested positive for GW1516, which is a banned substance in the sport.
Eddie Hearn said: ‘We have been informed by VADA that there has been an adverse finding in Jarrell Miller’s sample collected on March 20th, 2019.’
More detail on what will now happen to the 1 June fight are expected to be announced soon.
What is GW1516? GW1516, also known as Cardarine, is a drug that was first produced in the 1990s but was later abandoned after seeing negative results from animal testing.
It was later shown on mice that high doses of the drug improved their physical performance, which soon led to it becoming a black market substance that was particularly popular with athletes.
Concerns about the drug being used by athletes were raised ahead of the Olympics in 2018, and the drug was later tested by the World Anti-Doping Agency (WADA).
In 2009 they decided to add it to the prohibited list, which forms one of the six International Standards.
The list is used to identify which substances are prohibited from being used, particularly for competitive sports.