The World Anti-Doping Agency (WADA) has dropped its doping case against five Mexico players that tested positive for clenbuterol.
The players in question failed tests prior to the 2011 Concacaf Gold Cup.
Guillermo Ocha, Edgar Duenas, Francisco Rodriguez, Antonio Naelson, Christian Bermudez missed the tournament in the United States, which Mexico won.
The quintet protested their innocence at the time and were always confident that they would be let off the hook.
WADA has now confirmed that its appeal at the Court of Arbitration for Sport has been dropped.
It agreed with Fifa that there was 'compelling evidence' that the positive tests were caused by contaminated meat.
WADA had initially challenged the decision of the Mexico Football Federation to clear the players of any wrongdoing.
They are, however, prepared to accept that Fifa were right in claiming that Mexico has a 'serious health problem' with meat contaminated with clenbuterol.
The five players at the centre of the probe are now free to get on with their respective careers.
The incident cost goalkeeper Guillermo Ochoa a summer switch to a top club in Europe, but he has admitted on a regular basis that he plans to use a spell at French outfit Ajaccio as a stepping stone to bigger and better things and he is now clear to pursue a switch elsewhere.