The levels of doping in sport are now worse than ever. Following are the main doping stories in sport in the first quarter of 2013:
Russia has never had a state-sponsored doping programme, President Vladimir Putin said on Wednesday, after the association of National Anti-Doping Organisations (NADOs) called for a temporary blanket ban on Russia from international sport.
'if my body is giving me company why should I stop the sport? Some foreign athletes run till 35 or 37. So I wanted to set an example for other athletes that age does not matter,' says MR Poovamma, Arjuna Awardee and the senior-most member of the Paris Olympics-bound Indian women's 4x400m relay team.
The postponement of the Tokyo Games to 2021 due to the coronavirus pandemic may have opened the door for dope-tainted Indian wrestler Narsingh Yadav to realise his dream of winning an Olympic medal. Yadav was handed a four-year doping ban just hours before his first bout at the Rio Olympics after the World Anti-Doping Agency (WADA) won its appeal against an earlier exoneration.
Russian Olympic medallist Alexander Krushelnitsky has denied taking a banned substance in a suspected doping case that has rocked the Pyeongchang Winter Games and could imperil Russia's efforts to regain its full Olympic status.
A US Open full of upsets and hungry, young contenders offered the latest sign that men's tennis has entered a new era
Dipa Karmakar is one of only five women in gymnastics history to have successfully executed the Produnova -- called the 'vault of death'.
India batsman Prithvi Shaw has been handed a back-dated eight-month suspension for a doping violation after ingesting a prohibited substance Terbutaline.
A look at the 10 cricketers who were punished for drug related offences.
South Korean police have arrested a foreign athlete competing at the World Aquatics Championships in Gwangju for suspected sexual harassment at a nightclub, a South Korean police official said on Sunday.
Nick Kyrgios is providing commentary by the court for ESPN and trading barbs with critics on social media. The Australian has not been shy to express an opinion.
RFI general secretary MV Sriram said that food supplements consumed by junior India campers would be investigated.
Several Indian athletes secured their spots for the upcoming Paris Olympics, with Jyothi Yarraji becoming the country's first female 100m hurdler to qualify.
Indian golfers will now come under the ambit of international anti-doping rules as the Professional Golf Tour of India (PGTI) which marks 10 years of its inception, on Saturday, took the initial steps in implementing the international doping guidelines.
Pakistan batsman Ahmed Shehzad has been banned for four months for violating anti-doping regulations after he tested positive for a prohibited substance in May, the country's cricket board (PCB) said on Friday.
Sinner won in Cincinnati this week to claim his fifth title of a breakout season before the revelation that he avoided a ban over two positive tests
Iga Swiatek on Thursday called for the sport's governing bodies to provide players with more tools to combat online abuse
Jannik Sinner will hope to block out a rocking home crowd on Sunday when he faces Taylor Fritz in the US Open final at Flushing Meadows, where the 12th seed will be bidding to become the first American man in 21 years to win a Grand Slam singles title.
NADA's Anti Doping Appeals Panel (ADAP), headed by Justice R V Easwar, set aside the Anti Doping Disciplinary Panel's (ADDP) verdict of four-year suspension after the athlete approached the appeals panel.
Rifle shooter Ravi Kumar is the second athlete after boxer Sumit Sangwan whose dope test results have come positive on Tuesday. Ravi accepted the results and is expecting the punishment, to be meted out by NADA, in a few days' time.
Former Tour de France winner and Team Saxo manager Bjarne Riis knew about doping in his team but failed to act.
Afghanistan wicketkeeper Mohammad Shahzad has been provisionally suspended after testing positive for a banned substance, the International Cricket Council (ICC) has said.
After Panwar's 'A' sample was found positive, the Indian Weightlifting Federation (IWF) suspended her provisionally.
Beijing's National Anti-Doping laboratory was suspended for a maximum of four months by the World Anti-Doping Agency (WADA) on Thursday after failing to comply with international standards.
IOA president P T Usha on Sunday slammed the revolting executive council members, saying they 'seem more focused on self-serving power play and monetary gain'
International athletics federation's Athletics Integrity Unit tweeted late on Tuesday to confirm Gomathi's dope flunk
None of the athletes Salazar has worked with were mentioned in Monday's report.
Zimbabwe suspends two players over alleged drug use
According to ICC rules, a player can be banned for life for on-pitch racist abuse if he breaches the anti-racism code three times. A first offence results in four to eight suspension points.
The alleged conspiracy in the Narsingh Yadav dope scandal began to unravel, on Wednesday, with the wrestler identifying two fellow grapplers as the saboteurs, who contaminated his food with a banned steroid, in a formal police complaint.
Commonwealth Games gold medallist weightlifter Sanjita Chanu has failed a dope test, the international federation said on Thursday.
Opening batsman Prithvi Shaw is likely to return to Mumbai's squad for the Syed Mushtaq Ali Trophy after serving his eight-month suspension for a doping violation.
France's Alize Cornet has been charged by the Tennis Anti-Doping Programme (TADP) after allegedly missing three out-of-competition drug tests, governing body the ITF said on Thursday.
Sports Minister Rajyavardhan Singh Rathore on Sunday said the Board of Control for Cricket in India could have ensured dope testing of the Indian cricketers by NADA but put the onus on WADA to make the Indian Board compliant of its Code.
Julien Alfred won the women's 100 metres final to claim Saint Lucia's first-ever Olympic medal.
Isinbayeva was under pressure to quit as head of RUSADA's supervisory council after the World Anti-Doping Agency (WADA) called for her removal, one of four steps it said were necessary for RUSADA to retrieve its right to oversee the testing of Russian athletes.
The current Olympic champion Italy's Marcell Jacobs, who has had a wretched time with injury since his shock Tokyo success, looked a little sluggish in finishing second in 10.05 behind Nigerian heat winner Kayinsola Ajayi (10.02).
Former Commonwealth Games gold-medallist Narsingh Pancham Yadav was elected chairman of the Wrestling Federation of India's Athletes' Commission in Varanasi on Wednesday, completing a process that was mandated by the sport's world governing body.
Dipa Karmakar scripts history, becomes first Indian gymnast to win gold in Asian Senior Championships
France's main anti-doping laboratory, already under a provisional ban, has been suspended from carrying out anti-doping activities for up to six months because of analytical issues, the World Anti-Doping Agency (WADA) said on Friday.