Mudryk's positive test was revealed during a routine urine sample as part of the FA's anti-doping program. The substance in question has not yet been disclosed, but it is believed to be a performance-enhancing drug.
The news has come as a major blow to both Mudryk and Chelsea. The winger has been one of the club's most exciting players this season, scoring 5 goals and providing 4 assists in his first 9 appearances for the Blues.
Chelsea have released a statement confirming the positive test, but have stressed that Mudryk is innocent until proven guilty.
Mudryk has denied any wrongdoing and has vowed to clear his name. He has also expressed his shock and disappointment at the positive test, saying that he has never knowingly taken any banned substances.
"I am devastated by this news," Mudryk said in a statement. "I have never taken any banned substances and I am committed to clearing my name."
If Mudryk is found guilty of doping, he could face a lengthy ban from football. The FA's anti-doping regulations state that a first-time offender can be banned for up to four years.
A ban of that length would be a major setback for Mudryk's career. He is just 24 years old and has the potential to become one of the best players in the world.
Chelsea have said that they will support Mudryk throughout the investigation. The club has also said that they will not hesitate to take action against Mudryk if he is found guilty of doping.
"We are fully supportive of Mykhailo and will do everything we can to help him clear his name," Chelsea said in a statement.
The news of Mudryk's positive doping test is a major blow to both the player and Chelsea. It remains to be seen whether Mudryk will be able to clear his name, but the consequences of a guilty verdict could be severe.