Virtually all the raw materials used by criminal gangs throughout the world to produce illegal performance-enhancing drugs come from China, World Anti-Doping Agency (WADA) director general David Howman said on Tuesday.
Olympic bronze-medallist Vijender Singh had tested negative for any banned substances conducted by the National Anti-Doping Agency.
The high-profile and much-delayed trial of a Spanish doctor accused of masterminding a doping ring in cycling got off to an anti-climactic start on Monday when his testimony was postponed until Tuesday.
India's Olympic hero Vijender Singh, who finds himself at the centre of a drug scandal, made himself available on Wednesday for an out-of-competition dope test by NADA officials, apparently under pressure from the Sports Ministry.
Tour de France champion Vincenzo Nibali can ride in this year's race after his Astana team kept their world tour licence on Thursday despite a string of doping cases, the International Cycling Union (UCI) said on Thursday.
The coach of Jamaican sprinters Asafa Powell and Sherone Simpson said on Tuesday they were not to blame after the Olympic medallists failed dope tests.
Following badminton World No 1 Lee Chong Wei's provisional ban, Rediff.com brings you ten top sports persons who gave in to drugs - one of the mighty perils that has affected modern sporting culture.
Russians, Belarusians to participate at Paris Olympics as neutrals
Indian Olympic Association vice-president Vijay Kumar Malhotra said the Sports Ministry should immediately initiate a high-level inquiry to find out the culprits who are responsible for sports persons failing dope tests.
Disgraced US cyclist Lance Armstrong has reportedly been ordered to answer questions about who knew what and when about his doping, including possibly his former wife and his attorneys.
Malaysian athletics official Karim Ibrahim has been hit with a six-year ban after he was found guilty of being involved in two doping cases, local media reported on Friday.
World athletics' governing body has suppressed a 2011 survey that reveals that up to a third of the world's top competitors admitted using banned performance-enhancing techniques, Britain's Sunday Times and German broadcaster ARD/WDR reported.
PCB banned Shoaib Akhtar for two years and fellow fast bowler Mohammad Asif for one year.
The sports field saw two special mentions at the 90th Oscar Awards on Sunday night.
Former Governor of Punjab Shahid Hamid and ex-cricketer Intikhab Alam have been named in the Pakistan Cricket Board's high-level committee to probe the dope scandal involving pace duo Shoaib Akhtar and Mohammad Asif.
Olympic and world 400 metres champion LaShawn Merritt has failed three doping tests for a banned substance and accepted a provisional suspension, his lawyer said on Thursday.
Little-known American golfer Bhavik Patel has been banned by the PGA Tour for one year after violating its anti-doping policy on the use of performance-enhancing substances, the PGA Tour said on Wednesday.
UK Anti-Doping (UKAD) said it was "deeply concerned and shocked" by a Sunday Times report in which a British doctor alleged he had prescribed banned performance-enhancing drugs to 150 sportsmen including several Premier League footballers.
Tejinder Singh and Edwin Raju, found guilty of doping at the Commonwealth Games, face life bans, the Indian Weightlifting Federation said.
Commonwealth Games champion Parupalli Kashyap knocked out top seed Lee Hyun Il of Korea in the men's singles opening round of the US Open Grand Prix Gold badminton tournament in Anaheim, United States.
The vice president of Cycling Australia Stephen Hodge has resigned after admitting to doping during his professional career as the repercussions of the Lance Armstrong scandal continued to reverberate around the world on Friday.
A female gymnast from Uzbekistan was provisionally suspended from the London Olympics on Sunday after failing a drug test, the second doping case of the games.
Chess's world governing body will introduce dope testing at the Asian Games this week, although the sport's top official in Doha said he had no idea how drugs could enhance chess performance.
Australian boxer Bianca Elmir's hopes of competing at the London Olympics are in jeopardy after she was slapped with a provisional ban for failing a doping test at national championships in February.
Argentine football legend Diego Maradona slammed FIFA after claiming seven of Costa Rica's players were subjected to post-match doping controls over fears sponsors would not pay up if bigger teams like Italy failed to get out of the group stage at the World Cup finals.
Pakistan's left-arm spinner Raza Hasan challenged a two-year ban imposed on him for failing a drug test, saying he was not given a chance to defend himself.
Recent doping scandals may have tainted the image of Indian weightlifting, but Commonwealth Games gold medal winner K Ravi Kumar says he just wanted to prove that medals could be won without resorting to performance-enhancing drugs.
Croneed a win atia to go through to the quarter-finals, while a draw would be enough for England.
Seeking to make track and field dope free, Athletics Federation of India on Sunday decided to prepare its own 'whereabouts' information and collect samples from suspected athletes anytime and from anywhere in the country.
Former triple Olympic champion Marion Jones was cleared of doping on Wednesday after her 'B' sample tested negative for the banned blood-boosting drug EPO.
Italy captain Fabio Cannavaro is being investigated by doping officials for a failing a drugs test after receiving emergency treatment on an insect bite, his club Juventus said on Thursday. The Italian Olympic Committee (CONI) said Cannavaro had requested an exemption after being treated for the bite but did not receive it before he was dope tested.
Sanamacha Chanu has been named as the second Indian woman weightlifter to be caught for doping at the Athens Olympics, a top Indian official said on Friday.
Floyd Landis is likely to lose his Tour de France title after he failed the second drugs test.
"We recently conducted a hearing and now a meeting of the panel is needed to arrive at the final decision," said former national sprint champion Adille Sumariwala.
Five Brazilian athletes training in Germany for this month's world championships have failed out of competition doping tests and will return home, the Brazilian Athletics Confederation (CBAt) has said.
Pakistan all rounders Shahid Afridi and Shoaib Malik underwent regular dope tests in Johannesburg.
As far as referee Alberto Undiano is concerned, diving by players is comparable to doping because it is becoming more sophisticated and difficult to detect.
The Athletics Federation of India (AFI) has banned six states, including Delhi and Haryana, for fielding overaged athletes while slapping two year suspension on 14 other athletes for doping.