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.
Jamaican sprinter Asafa Powell has issued a statement calling his 18-month ban for taking a banned substance 'patently unjust'.
Powell, 31, said he had unknowingly taken oxilofrine when he was using a legal supplement called Epiphany D1.
He added that his team had contacted doping authorities to point out that oxilofrine was not listed as an ingredient for Epiphany D1.
The former world record holder also questioned the severity of his punishment, claiming it was "clearly not based on the offense nor the facts surrounding it".
Powell's team is now preparing to take his case to the Court of Arbitration for Sport in Switzerland.
Dr Eufemiano Fuentes has received a one year suspended prison term after being found guilty of blood doping services to cyclists.
The doping doctor was also banned from practicing for four years and will pay a fine of €15 per day for the next 10 months.
The US Anti-Doping Agency has claimed that Lance Armstrong "was worried of potential criminal and civil liability" if he gave evidence to them about doping:
We have provided Mr Armstrong several opportunities to assist in our ongoing efforts to clean up the sport of cycling.
Following his recent television interview, we again invited him to come in and provide honest information, and he was informed in writing by the World Anti-Doping Agency (WADA) that this was the appropriate avenue for him if he wanted to be part of the solution.
Over the last few weeks he has led us to believe that he wanted to come in and assist USADA, but was worried of potential criminal and civil liability if he did so.
Today we learned from the media that Mr Armstrong is choosing not to come in and be truthful and that he will not take the opportunity to work toward righting his wrongs in sport.
Lance Armstrong's lawyer has said the cyclist will not be interviewed under oath by a U.S. Anti-Doping Agency official who wanted him to tell them all he knows about doping:
Lance is willing to cooperate fully and has been very clear: He will be the first man through the door, and once inside will answer every question, at an international tribunal formed to comprehensively address pro cycling, an almost exclusively European sport.
We remain hopeful that an international effort will be mounted, and we will do everything we can to facilitate that result.
In the meantime, for several reasons, Lance will not participate in USADA's efforts to selectively conduct American prosecutions that only demonise selected individuals while failing to address the 95% of the sport over which USADA has no jurisdiction.
Lance Armstrong's lawyer has said the cyclist won't be interviewed under oath by a U.S. Anti-Doping Agency official who wanted him to tell them all he knows about doping, according to the AP news agency.
USADA officials had said the disgraced cyclist must speak with them if he hoped to reduce his lifetime ban from sports. Today was the deadline for him to agree to speak to them.
Tim Herman said the process served "only to demonise selected individuals."
A Spanish doctor who may hold the secrets to drug cheating in football and tennis, has gone on trial in Madrid.
The public health charges against Eufemiano Fuentes relate only to cyclists he worked with.
But the man leading the worldwide fight against doping told ITV News that the doctor was involved with athletes from a variety of other sports. ITV News Sports Editor Steve Scott reports:
The hearing to open the cycling doping trial of Spanish doctor Eufemiano Fuentes has closed for the day.
Dr Fuentes is scheduled to speak tomorrow in Madrid, Spanish media has reported, as he begins his defence against charges that he broke public health laws by conducting performance-enhancing blood transfusions.