In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].

Justin Gatlin easily beat two big-name rivals by clocking 9.75 seconds in the 100 metres at the Athletissima Diamond League race on Thursday. The in-form Gatlin left Jamaica's Asafa Powell trailing in 9.92, the same time as his fellow American Tyson Gay in third. The time was 0.01 outside Gatlin's world-leading season-best and the 2004 Olympic champion remained unbeaten over 100 since 2013. Gatlin is increasingly looking like the man to beat at the world championships in Beijing next month as title holder Usain Bolt struggles with a leg injury. The race featured five athletes that have previously tested positive banned substances - Gatlin, Powell, Gay and Michael Rodgers - all who finished in the in the top four as well Kim Collins.Justin Gatlin won the race with a time of 9.75 secondsThe in-form Gatlin left Jamaica's Asafa Powell trailing in 9.92Gatlin is increasingly looking like the man to beat at the world championships in Beijing next monthFive of the seven runners had previously tested positive banned substances 
 Question:Though _ and Powell were faster out of the blocks on a breezy night, Gatlin drew ahead within 30 meters and quickly went clear.
Gatlin