UEFA says it will carry out its largest pre-tournament drugs-testing programme ahead of Euro 2016 in France.
All players with the potential to be selected for teams will be subjected to testing from January 1 via UEFA's programme.
UEFA said it will have "the strongest anti-doping programme ever seen in European football" this season, including the introduction of the World Anti-Doping Agency's (WADA) steroidal biological passport to improve the identification of steroid use.
It will also strengthen rules related to team and player whereabouts and have long-term sample storage to permit retrospective identification of banned substances.
