Gatlin last month ran 9.74 - a personal best and the fastest 100 metres of 2015 - in Doha and a season - leading 19.68 in the 200 in Eugene 15 days later .
Gatlin has served two doping bans .
Gatlin , who has served two doping bans , last month ran 9.74 - a personal best and the fastest 100 metres of 2015 - in Doha and a season - leading 19.68 in the 200 in Eugene 15 days later .