A look at the 10 significant events that have helped to shape the fight against the use of performance-enhancing drugs in sport in the decade since the World Anti-Doping Agency (WADA) was formed on November 10, 1999.
Shoaib Akhtar believes the dope saga is behind him despite the matter lying before the Court of Arbitration for Sports
'We are now able to confirm a cover up that dates back until at least 2011 and continued after the Sochi Olympic Games. It was a cover up that evolved from uncontrolled chaos to an institutionalised and disciplined medal-winning conspiracy'
Sport's highest tribunal began a four-day hearing, on Monday, which could result in three-times Tour de France champion Alberto Contador being stripped of his 2010 title for doping.
Kolkata Knight Riders left-arm seamer Pradeep Sangwan has failed a random dope test in the Indian Premier League, it was reported on Thursday.
The International Weightlifting Federation (IWF) was plagued by decades of corruption orchestrated by autocratic former president Tamas Ajan, said Richard McLaren after he led an independent investigation into the governing body. McLaren, the Canadian law professor whose findings in July 2016 led to Russia being banned from all international athletic competitions, including the Rio Olympics, told reporters on Thursday that the IWF was rife with corruption. This included vote buying, doping cover-ups and $10.4 million in cash that cannot be accounted for.
Sebastian Coe chairs a meeting of world athletics on Friday to discuss suspending Russia over allegations of state sponsored doping of its athletes, a crisis that has put his leadership under the spotlight barely three months into the job.
American rider Floyd Landis was banned for two years after being found guilty of doping by a US arbitration panel.
On January 24, Taylor made a stunning disclosure that he was blackmailed after "foolishly" taking cocaine during his meeting with an Indian businessman.
The IOC said it had not detected any significant abuse of clenbuterol after finding "very low levels" of the banned substance during re-testing of samples from the Beijing Olympics.
The doping menace continues to haunt Indian sport. The National Doping Agency (NADA) on Thursday announced that nine athletes tested positive for banned substances during the National Games, which concluded in Ranchi on February 26.
Winter Games' least taxing and physically demanding sports feel it necessary to use performance-enhancing drugs
'Following AIU charges based on LIMS data, Russian athlete Natalia Antyukh has been banned for the use of a Prohibited Substance/Method. DQ results from 15 July 2012 until 29 June 2013.'
Russian President Vladimir Putin believes that WADA has violated the Olympic Charter in banning Russia and hence they have a ground to appeal.
The BBC report said a third of medals in endurance events at the Olympics and world championships between 2001 and 2012 were won by athletes who have recorded "suspicious tests".
Former World No 1 Maria Sharapova is expected to face a disciplinary hearing over a drug violation in June.
Dozens of Russian athletes who competed at the 2014 Sochi Winter Olympics, including at least 15 medal winners, were part of a state-run doping program.
In a list of hearings published on its website, CAS wrote that the appeal by RUSADA against sanctions imposed by the World Anti-Doping Agency (WADA) would take place from Nov. 2-5 this year.
Russia has been banned from the 2018 Pyeongchang Winter Olympics after the IOC found evidence of an "unprecedented systematic manipulation" of the anti-doping system that has led to a series of bans for the country's athletes in recent months.
The dawn of a new era had begun under Sourav Ganguly's aggressive leadership. With Ganguly and Coach John Wright at the helm India had transitioned into a force to be reckoned with.
Russian gymnasts must be allowed to compete in the Olympic Games and not tarred with the same brush as the country's banned track and field athletes, the International Gymnastics Federation (FIG) said on Monday.
Olympic gold medallist swimmer Park Tae-hwan, who completed an 18-month doping ban in March, will be unable to compete at the Rio Games after the Korean Olympic Committee opted against amending a rule that tacks three more years onto doping suspensions.
FIFA formally signed the new World Anti-Doping code on Friday during its annual Congress in Sydney. Soccer's world governing body had previously been reluctant to sign the agreement because it was opposed to some of WADA's (World Anti-Doping Agency) rules, including uniform two-year bans for athletes caught using performance-enhancing drugs.
Images from the US Open men's singles second round matches, at Flushing Meadows, New York, on Thursday.
Anti-doping officials have met with six top-flight Australian rugby league clubs named in a national probe into the use of banned performance-enhancing drugs that has sent shockwaves through the sports-mad country.
The IABF disciplinary committee found the three who tested positive at the National Games "prima facie guilty".
Brazil's athletes were not subject to dope tests for almost a month before the Rio Olympics, the country's sports ministry has said while refuting allegations it was a political decision to ensure the Games were not plunged further into crisis.
CAS said that the Olympic Athletes from Russia mixed doubles curling team, who won bronze at the Games, had been disqualified from the competition.
Gimnasia-La Plata midfielder Esteban Gonzalez became the second Argentine footballer to fail a doping test in as many days.
China's top swimmer Sun Yang questioned the credentials of the testers before members of his entourage smashed vials containing his blood samples with a hammer. His eight-year ban rules him out of this year's Tokyo Games
The doping menace in Indian athletics continues. Four athletes were caught using banned substances during the Federation Cup Senior National Championships in Patiala last month. The 'A' samples of the four were found to have contained stanozolol, methandienone anabolic steroid and methylhexaneamine stimulant.
The Russian Sports Ministry said on Tuesday it was open for closer cooperation with the World Anti-Doping Agency (WADA) in order to eliminate any irregularities committed by the Russian anti-doping watchdog and its accredited laboratory.
Kenyans convicted of doping offences will face at least three years in prison and heavy fines under a draft law to be submitted to parliament, the chairman of a government-backed anti-doping task force.
Michael Phelps urged US lawmakers on Tuesday to push for a reform of the global anti-doping effort in sport after a career in which the Olympic great said he was never confident he was competing against clean athletes.
The WADA investigation found that the sample analysis methods of the NDTL were not upto the mark. The NDTL can appeal to the Court of Arbitration for Sports (CAS) in Lausanne in the next 21 days.
West Indies all-rounder Andre Russell was banned on Tuesday for one year for a doping whereabouts rule violation.
Russian Sports Minister Vitaly Mutko said on Thursday his country's doping scandal was payback from those unhappy Russia had won the rights to host the 2018 FIFA World Cup.
Maria Sharapova will appeal a two-year ban for doping imposed by the International Tennis Federation on Wednesday.