Chelsea forward Mykhailo Mudryk says he is in 'complete shock' after being provisionally suspended by the Football Association (FA) after being notified of a positive drug test.
"I can confirm that I have been notified that a sample I provided to The FA contained a banned substance," he wrote in a post on Instagram.
"This has come as a complete shock as I have never knowingly used any banned substances or broken any rules, and am working closely with my team to investigate how this could have happened.
"I know that I have not done anything wrong and remain hopeful that I will be back on the pitch soon. I cannot say any more now due to the confidentiality of the process, but I will as soon as I can."