Sebastian Coe has rejected claims that London 2012 may have been the dirtiest Olympic Games in history. Coe went on the offensive after another week of doping scandals rocked the Olympic movement.The International Olympic Committee announced on Thursday that 23 athletes who competed in London have tested positive from 265 retested samples. That is top of over 30 previous failed tests from competitors who had been caught either during the Games or since. The high percentage of apparent doping offences sparked suggestions on Friday that London was rife with cheating, but Coe denies that is the case.Lord Coe, now the president of world athletics governing body the IAAF, served as the London 2012 organising committee chairman. Lord Sebastian Coe denies 2012 was the dirtiest Games The former middle-distance track star claims in the Sunday Telegraph that at the time of the 1984 Olympics in Los Angeles, where he competed and won 1500m gold, technology was prehistoric and says many athletes would pick and base their schedules on the athletics circuit in large part on the avoidance of testing.The IOC has said its reanalysis programme is ongoing, with the possibility of more results in the weeks to come.Coe wrote in his newspaper column: It would be delusional to say the London Games was in the words of many yesterday dirtier than Games before.He added: The message from Friday was not only, or even actually, about interpreting trends.The big message was for athletes to recognise that just because they may be ahead of the testing technology at a particular moment in their career, it does not mean they can lie easily in their beds until excitable grandchildren pore over Olympic medals in their dotage.They will be caught. They will then have the discomfort of explaining to those grandchildren why they no longer possess those medals. More is being done to catch cheats than ever before. Anti-doping test samples We will not stop collecting data, sharing information, building profiles, developing testing techniques or calling out and prosecuting cheats in our efforts to protect and promote clean sport. The Rio 2016 Games will be cleaner for it. That should be the story.The new findings cover five different sports and six international federations, and were all based on intelligence-gathering that began in August 2015.Russia has said eight of its athletes are among the 23 to have tested positive on reanalysis.All athletes found to have infringed the anti-doping rules will be banned from competing at the Rio Olympics this summer. Also See: 23 positive after London retests Eight Russians fail retests Sharapova in Olympic squad GB may get 2008 medal boost Wholesale NHL Jerseys China . 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The Pistons seem to have improved their chances of ending their four-year post-season drought with a series of moves this summer. The 23-year-old Jennings averaged 17.5 points and a career-high 6.5 assists last season, ranking among the leagues top 20 in both categories, and 2.5 turnovers. The restricted free agent has agreed to a $24 million, three-year contract with the Pistons. Milwaukee drafted Jennings 10th overall in 2009 out of Oak Hill Academy and he averaged 17 points, 5.7 assiists and 2.dddddddddddd4 turnovers over four seasons with the Bucks, who couldve matched any offer made to the restricted free agent this off-season. "We evaluated all of our options and we determined this was the best one for us at this time," Bucks general manager John Hammond said in a telephone interview. Detroit drafted Knight eighth overall in 2011 out of Kentucky. He averaged 13.1 points, 3.9 assists and 2.7 turnovers over the last two seasons. "Were excited about being able to add a young point guard, who we expect to have a long and successful career with us," Hammond said. Middleton, a second-round pick last year, averaged 6.1 points in 27 games with the Pistons. "This is going to be a great opportunity for Khris because hes going to have a chance to earn viable minutes and we hope he takes advantage of it," Hammond said. The 6-foot-11 Kravtsov averaged 3.1 points in 25 games last season as a rookie, and might not end up being on the opening-day roster with the Bucks. Milwaukee, coming off its first post-season in three years, signed free agent combo guard Gary Neal to a two-year deal worth just under $6 million on Tuesday. Neal will help add some scoring to a backcourt that will be without Monta Ellis and J.J. Redick next season. 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