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Usain Bolt pocked up the eighth Olympic gold medal of his career with a convincing victory in the men's 200 metres final to keep alive his hopes of a treble treble.
Surprisingly, Bolt was out of the blocks quickly and wasted little time in moving alongside France's Christophe Lemaitre outside him. Entering the home straight he had a clear advantage over the field.
With gold all but secured the Jamaican was in a race against the clock as he bid to break his own world record but he his 19.19 was never under threat as he crossed the line in 19.78.
"The fact I came here and executed what I wanted to is a brilliant feeling," he told BBC Sport.
"I wasn't happy with the time when I crossed the line but I'm excited I got the gold medal - that's the key thing."
Having already won the 100m, Bolt will now bid for a ninth gold medal when he competes in the 4x100m relay final on Friday.
"What else can I do to prove I am the greatest? I'm trying to be one of the greatest, to be among Ali and Pele," added Bolt.
"I have made the sport exciting, I have made people want to see the sport. I have put the sport on a different level."
Canada's Andre de Grasse once again chased Bolt home in second with Lemaitre just beating Britain's Adam Gemili to the bronze medal.
Lemaitre and Gemili clocked the same time but the Frenchman was given the nod in the photo finish.
American Dalilah Muhammad stormed to the women's 400m hurdle title, clocking 53.13 to beat Sara Slott Petersen.
Muhammad's compatriot Ashley Spencer ran a personal best of 53.75 to take bronze.
I was feeling really tired before the race, but I just trusted in myself and my abilities," Muhammad said.
Meanwhile, the United States qualified for the women's 4x100 metres final at the second time of asking.
The defending champions failed to progress from the morning heats when Allyson Felix struggled to pass the baton to English Gardner but they appealed the result, arguing that Brazilian Kauiza Venancio had bumped into Felix at the handover.
The IAAF ruled in favour of the Americans and they were given the chance to beat the 42.70 second time posted by China.
Returning to the track to race on their own the Americans seized their second opportunity to qualify in 41.77 seconds, joining Jamaica, Britain, Germany, Ukraine, Nigeria, Trinidad and Tobago and Canada in Friday's final.
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