"The International Association of Athletics Federations (IAAF) has remarked that the credibility of track and field's anti-doping program has been "enhanced, not diminished" after sprinters Tyson Gay and Asafa Powell tested positive for banned substances.
"I am not now - nor have I ever been - a cheat," Powell posted on Twitter.
Olympic gold medalist Sherone Simpson, who tested positive for the same stimulant oxilofrine, said she "would not intentionally take an illegal substance of any form into my system.""
"The IOC and IAAF are looking at the bright side of the latest doping scandals to jolt track and field. The world bodies said though the positive tests that nabbed top-name sprinters Tyson Gay, Asafa Powell, and Sherone Simpson are disappointing but they have shown proof that global drug-testing efforts are working."
"He will also need to do his bit to ensure the sport promotes a robust drug testing programme, while placating those leading players who have expressed distrust in the system after two much-discussed recent cases."
"LONDON - Novak Djokovic's scathing comments on tennis' anti-doping authorities have dominated conversation at the ATP World Tour Finals this week. The world No. 2 said he had lost all faith in the anti-doping system after the way fellow Serb Viktor Troicki's punishment was handled for failing to provide a requested blood sample."
"However, those years of unparalleled success on the road and manipulation of the legal system could cost the man who was stripped of his seven Tour de France titles a large proportion of his estate.
It is a year since the US Anti-Doping Agency published its 202-page report into what its chief executive, Travis Tygart, described as the "most sophisticated, professionalised and successful doping program that sport has ever seen"."
"FILE - Cloudy skies shroud the Capitol in Washington, Monday morning, Oct. 14, 2013 as Senate Democratic and Republican leaders remained at odds over spending in their last-ditch negotiations to end the government shutdown. At a time when many people say that the political system and societal institutions aren't working, the news in 2013 provided multiple sources of confirmation, both at home and abroad. It was the year when things broke down - or at least it often left many people feeling that way."
"Researchers at the University of British Columbia have developed a DNA test to catch athletes who use blood doping to enhance their performance, but its limitations mean the current testing system will continue to detect cheaters."
"VANCOUVER -- Researchers at the University of British Columbia have developed a DNA test to catch athletes who use blood doping to enhance their performance, but its limitations mean the current testing system will continue to detect cheaters."
"Colombian climbing sensation Nairo Quintana has remarked that fight against doping of cycling has helped him excel at the Tour de France by allowing his intense training to make a difference."