Justin Gatlin

Gatlin fires coach caught in doping sting

An investigation published by Britain's Telegraph newspaper, using journalists pretending to be making a film, approached Mitchell and an agent linked to Gatlin, Robert Wagner.

The Telegraph claims Wagner offered to "supply and administer testosterone and human growth hormone for an actor training for a film," to reporters for a fee of $350,000.

And the matter is now the subject of an investigation by the United States Anti- Doping Agency (USADA) and the Athletics Integrity Unit (AIU), according to the Telegraph and the Press Association.

Gatlin denies Bolt golden swansong

The iconic Jamaican had to settle for bronze despite matching his season's best of 9.95 seconds, long-time rival Gatlin denying him a final slice of individual glory by three hundredths of a second.

Promising prospect Christian Coleman claimed the silver medal with a 9.94s run, but it was Bolt's name that was nevertheless chanted when the results were confirmed on the big screen at London Stadium.

Rio 2016: Gatlin is slowing down - Bolt

Usain Bolt was unsurprised to see Justin Gatlin fail to make the final of the 200 metres at Rio 2016, claiming the American is "slowing down".

Reigning champion and world record holder Bolt booked his place in the final by winning his heat in a season's best 19.78 seconds, though Andre De Grasse ran him close to the line.

Rio 2016: Bolt on track for 'triple-triple' after 200m stroll

Usain Bolt's bid for a 'triple-triple' is a step closer after he breezed into Thursday's 200 metre final.

Just three days after defending his 100m title in scintillating fashion - Bolt had time to smile for the cameras as he dominated the field - the Jamaican sprint king was at it again inside the Olympic Stadium on Wednesday.

The Showdown II: Bolt and Gatlin to face-off in 200m final

After Bolt edged the American by .01 second in Sunday's 100 final, he is now running in his favored race and seeking his record 10th world title overall.

Bolt was grinning widely after crossing in 19.95 seconds, coasting for about 60 meters and checking the stadium screens high up in the stands of the Bird's Nest to see if someone could come close. As usual, none did.

Usain Bolt beats Justin Gatlin for gold in 100 at worlds

Bolt was trailing for almost the entire race in the biggest showdown in the sport in years. But with gritted teeth, the two-time Olympic champion clawed back into contention and made his giant stride count to win in 9.79 seconds — .01 seconds faster than the American veteran.

"A lot of people counted me out," Bolt said. "So for me to come and win, this is a big deal."

Lucky Bolt qualifies for 100m final, will face Gatlin

  American Gatlin qualified fastest in 9.77.

Jamaican Asafa Powell also secured his spot in the semi-finals after putting in a strong run to finish second behind Tyson Gay in his semi-final.  Gay clocked 9.96 for top spot while Powell was just behind 9.97.  

World Championships: Bolt posts 5th-fastest time in 100m heats

Gatlin upstaged the Jamaican with the top time in the first round, even though the American got a little push from nature with a strong back wind of 2.1 meters per second during his 9.83-second race.

Bolt could count on an adoring crowd but faced a slight headwind as he cruised to a time of 9.96, the fifth fastest overall.

"It was OK. It was not perfect," Bolt said. "I still have some adjustments. Just have to concentrate on my technique now."

VIDEO: I can't solve doping issue alone - Bolt

The Jamaican world record holder says he is running for himself and that the responsibility for clean sport is "not only on me".

Bolt is expected to face AmericanJustin Gatlin, the world's fastest man this season - in Sunday's 100m final.

Gatlin have served two drugs bans.