Electronic Sports League (ESL), which is one of the largest eSports organizations in the world, will soon introduce and begin policing performance-enhancing drugs at its events.

The news comes after Cory "Semphis" Friesen, a high level, professional Counter-Strike: Global Offensive player, admitted last week he and other members of his team at the time, Cloud9, used Adderall, a psychostimulant usually used to treat attention deficit hyperactivity disorder (ADHD), during ESL's $250,000 tournament in Poland.

Head of Communications at ESL Anna Rozwandowicz told Motherboard in an email that it will outline the details of its new policy soon, but that for now it has "taken steps to move forward with drugs policing, education, and prevention among participants of [its] competitions."

Friesen and the rest of Cloud 9, however, will not be punished for allegedly using Adderall at ESL's event.

"We have no way of knowing whether Semphis, despite what he said, has actually taken Adderall or not," Rozwandowicz said. "We can't punish someone if we are not 100 percent sure he is guilty. And as we have no way to test it anymore (we're four months after the event), we won't take action in this specific case."