After a pilot program that was first conducted at the Club World Cup in 2011, FIFA has officially introduced biological profiling to test athletes for use of banned substances at the 2013 Confederations Cup in Brazil.
All eight teams taking part in the event were tested during training on Sunday with the level of the chemicals in their samples measured to improve future doping controls.
The world football’s governing body has already announced that the testing will be extended to all 32 teams that qualify for the World Cup finals in Brazil in 2014.
Get a different perspective
Every story can be told in many ways: see the perspectives from Euronews journalists in our other language teams.