Usain Bolt passed on a message to those who fail adhere with doping rules in Athletics.
The eight time Olympic Champion is said to retire after the IAAF World Championships in London in a few days.
"Athletes who dope must stop or the sport will die. I said a couple of years ago it had to get really bad, when there's nowhere else to go but up. Doping is a bad thing and it's never pleasant because you put in the hard work and the sport starts going forward and then you have guys bringing it back, it's hard." said Bolt
The Jamaican superstar has his eyes firmly set on his 100m race and the 4x100m.
"I'm ready, I'm always ready, I have to prove myself once more" said the world record holder
Usain Bolt holds the world record in 100m with a time of 09.58 sec and 200m with time of 19.19sec