year ban for failed drugs tests London 2012 chairman Sebastian Coe wants the ban for failing a drugs test to be increased from two to four years. The double Olympic champion's claim comes after sprinters Tyson Gay and Asafa Powell provided positive samples. We have to go back from two years to four years. The move down to two did a lot of damage to my sport," Lord Coe told BBC Radio 5 live's Sportsweek. It is for the clean athletes. I don't care about the cheats we weed out. These people are trashing my sport. While the 1500m gold medallist from Moscow 1980 and Los Angeles 1984 does not believe trust in the sport has completely evaporated, Lord Coe is concerned people are losing faith in athletics. It is depressing. Trust sits at the heart of this," said Lord Coe, who is also vice-president of the International Association of Athletics Federations (IAAF). I don't think trust is gone entirely, but it was a bad day for the sport. The big challenge here is to go on fighting, this is not a fight we can afford to lose. It is about trust. If fans can't trust the athletes and go there knowing what they are watching is questionable, then we will descend to American wrestling where most of the crowd know it is fake and, worryingly, don't care.