Footballers at this summer's World Cup will be among the first athletes to face a new testing system designed to weed out doping in sport.
Under the new regime athletes will have blood and urine samples compared over time to create a 'biological passport' that tracks changes in their body over time.
Major sports federations, medics and doping experts agreed to the new system, which they hope will combat increasingly sophisticated doping techniques.
More top news
The president of the world athletics body had faced repeated questions about a conflict of interests over the bid for the Eugene 2021 games.
Temperatures begin to slip away as the weekend approaches
George Osborne has managed to get what he wanted - less generous welfare payments and a clear incentive to encourage people back into work.