Despite a number of criticisms that has followed 100m and 200m runner Justin Gatlin after doping incidents, the athlete seems undeterred as evident in his performance so far since returning to the tracks.
The 33-year-old is looking for another fast 100 in Rome come Thursday, June 4.
Gatlin, who has served two doping bans including a ban in 2006 after testing positive for the banned steroid testosterone rocketed to a lifetime best of 9.74 seconds in the 100 meters on May 15.
And just last weekend he equalled his fastest ever 200m with a time of 19.68 seconds at the Prefontaine Classic.
An analyst has called him the only threat to Usain Bolt. Gatlin won gold in 2004 Olympics and was world champion at 100m in 2005.
The American returned to the tracks in 2010 after his four-year ban and has improved steadily by winning bronze in both the 2012 Olympics and the 2013 world championships.