Olympic bronze-medallist Vijender Singh had tested negative for any banned substances conducted by the National Anti-Doping Agency.
Disgraced former Tour de France winner Jan Ullrich admitted that he underwent blood-doping procedures under the guidance of a Spanish doctor at the heart of a major drugs scandal.
The 27-year-old gold medallist in the 20km race-walk event at the National Inter-State Championships in June, has been asked to return home from Budapest after Athletics Federation of India (AFI) received a notification from NADA regarding the athlete's "whereabouts failure".
US sprinter Justin Gatlin clocked 10.17 seconds on Sunday to win his second consecutive 100 metres final since coming back from a four-year doping ban.
Former World No 1 Vijay Singh sued the PGA Tour on Wednesday, a week after golf's premier tour dropped a doping a case against the three-times major winner.
Jamaica's twice Olympic 200 metres champion Veronica Campbell-Brown was suspended by her national federation on Tuesday following a positive test for a banned diuretic at a meeting last month.
Damaging wind gusts, a fresh doping controversy and the robbery of a visiting government minister presented the Rio Games with a perfect storm of problems on Sunday, forcing organisers to scramble to keep the world's biggest sporting event rolling on.
Former world number one Maria Sharapova has been invited to play at the Madrid Open in May, which takes place less than two weeks after her 15-month doping ban expires, tournament organisers said on Wednesday.
Russian long jumper Darya Klishina will compete at the Rio Olympics after her ban from the Games was struck down by sport's highest court on the eve of her event.
She should win her place thanks to good results, says Radwanska
Slovenia men's ice hockey player Ziga Jeglic has tested positive for a banned substance and has been suspended for the remainder of the Pyeongchang Winter Olympics, the Court of Arbitration for Sport said on Tuesday.
The Jamaican government needs to establish an accredited anti-doping laboratory to protect its world-class athletes from taking contaminated substances, the coach of world record holder and Olympic champion Usain Bolt says.
Two athletes saw their Olympic hopes cut short on Sunday after being suspended from the London 2012 Games for using banned performance-enhancing drugs, taking the tally of doping offenders after two days of competition to three.
The top two in the 1998 Tour de France - Italian Marco Pantani and Germany's Jan Ullrich - were taking the banned blood booster EPO, a French Senate inquiry into sports doping said on Wednesday.
Jamaica's 200 metres world champion Veronica Campbell-Brown has tested positive for a banned diuretic, sources close to Jamaican athletics told Reuters.
Andre Russell looks set to play in the World Twenty20 after the Jamaica Anti-Doping Commission said on Friday the West Indies all-rounder would not be suspended pending a hearing into his "anti-doping whereabouts" rule violation.
The soft-spoken Rudisha, belonging to the Masai tribe, was critical of runners tarring the country's image.
AC Milan striker Marco Borriello has been suspended after testing positive in a routine doping test.
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.
Doping could cast a shadow over Kenya at the 2016 Rio Olympics unless the East African nation implements credible systems to root out drugs cheats, said veteran Kenya-based coach Brother Colm O'Connell.
The ruling by the CAS, sport's highest tribunal, will be taken into consideration by the International Olympic Committee (IOC) as it ponders whether to impose a blanket ban on Russia from all sports.
Batsman Jesse Ryder will return to top-level cricket in New Zealand next week, ready to put behind him a year in which he served a six-month doping ban and survived an assault that left him in a coma with serious head injuries.
Indian weightlifter B Prameelavalli said she pulled out of the Commonwealth Games because of an injury and the positive dope test was a surprise for her.
Rider Stefan Schumacher's admission that he had used banned substances was welcomed by the German Olympic Sports Confederation (DOSB) and national cycling federation (BDR) on Friday.
A summary of sports events and persons who made news on Thursday.
The Korea Olympic Committee has turned down Park Tae-hwan's appeal to overturn a controversial doping suspension, leaving the swimmer's hopes of competing at the Rio Games in the hands of the Court of Arbitration for Sport (CAS).
The Athletics Federation of India (AFI) has pulled out dope-flunked shot putter P Udaya Laxmi from the home squad for the ongoing Asian Championships in Pune after testing positive for a banned substance.
The Middlesbrough defender tested positive for the banned anabolic steroid dianabol after a UEFA Cup tie.
This year Olympic Games could feature an athletics programme without two of the sport's most powerful nations -- Russia and Kenya -- while a third, Ethiopia, is under immense pressure to show it has adequate anti-doping measures.
"Simona Halep, a 31-year-old Romanian tennis player, has been provisionally suspended under Article 7.12.1 of the 2022 Tennis Anti-Doping Programme (TADP)," the body said in a statement.
American Gatlin, bronze medallist at the London Games after a four-year doping ban, ran 9.94 seconds to edge Usain Bolt by 0.01 in a race that showed the Jamaican has yet to fully recover from the hamstring injury that dogged him earlier in the season.
Arjuna award-winning Indian boxer Akhil Kumar has suggested setting up sports medicine centres all over the country to check incidents of doping as he feels athletes often end up using banned drugs due to ignorance.
Mirabai Chanu was the historic success story of Indian weightlifting in a blemish-free 2017 in which the sport managed to stay clear of the dope scandals that have destroyed its credibility in the past.
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.
Narsingh Yadav's hopes of competing in the Rio Olympics appeared bleak after he failed a second dope test, which was conducted on his samples on July 5.
Five nations, including Russia, whose doping records have risked weightlifting's place on the Olympic schedule have been limited to just two athletes for the 2020 Tokyo Games by the sport's governing body, according to a document seen by Reuters.
The IOC seems reluctant to ban the entire Russian team from next month's Olympic Games, despite mounting concern over doping violations, the co-author of the report that led to Russia's ban from track and field events said on Wednesday.
Chris Evert said on Monday she was stunned to hear that Maria Sharapova failed a doping test, but not by the fact that there is doping in tennis, claiming that she knew players who doped during her career.
Russia has been at odds with the Olympic movement ever since its own Sochi Winter Games in 2014, where its athletes were found to have benefited for years from a large-scale state-sponsored doping programme - something Moscow denied.
Russia was the leading doping offender in global sport during 2014, followed by Italy and India, the World Anti-Doping Agency said on Wednesday.
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