Usain Bolt made history when the Jamaican successfully defended his Olympic 200m crown to claim an unprecedented second successive sprint double.
Bolt, who retained his 100m title in style on Saturday, crossed the line in 19.32sec -- the equal fourth fastest time of all time -- in front of a delirious sell-out 80,000 crowd at the Olympic Stadium.
The 25-year-old's victory meant he bettered the record of US track legend Carl Lewis, who won three golds and a silver in the sprints at the 1984 and 1988 Games.
Bolt said: "This is the one I wanted and I got it. I'm now a legend, I'm also the greatest athlete to live.
"I've got nothing left to prove. I've showed the world I'm the best and, right now, I just want to enjoy myself."
It was also the first time two individual track titles were successfully defended at successive Games since Finland's Lasse Viren won the 5,000m and 10,000m in the Munich and Montreal Games in 1972 and 1976.
Bolt led a Jamaican clean sweep of the medals, with training partner Yohan Blake taking silver in 19.44sec and Warren Weir claiming a shock bronze in 19.84sec.
The only thing missing from the race was a new world record for Bolt, but he revealed he had felt a flicker of back pain during the race.
"I could feel the strain on my back a little bit so all I did was try to keep my form, run home and when I saw where I was going I stopped running because I knew it wasn't going to be a world record," he said.
"The 200m was harder than I expected. I could feel the pressure coming off the bend and that's when I had to focus."
Running in lane seven, Bolt made an explosive start and was up on Weir in the lane outside him within five paces.
As he rounded the bend, Blake briefly threatened from lane four, but teeth clenched, eyes on the big screen and at full tilt, Bolt was far enough to slow down a full 10 metres from the line, raising his finger to his lips.
