Superstar duo Mo Farah and Shelly-Ann Fraser-Pryce completed historic track doubles at the world athletics championships in Moscow on Friday night.
Farah went to the front for the final time with 650 metres to go in the 5000m, kicked three times and was never headed.
He joined Ethiopian legend Kenenisa Bekele as the only male athlete to win the men's 5000-10,000m double at the same world championships.
Starting with the 5000m two years ago at the world titles in Daegu, he has won five straight world and Olympic golds over 5000m and 10,000m.
And all this from a runner who was little more than a journeyman until his late 20s, when he moved to the United States to join forces with coach Alberto Salazar.
Farah ran a 53.5-second last lap on Friday in a winning time of 13 minutes 26.98 seconds, with minor medallists Hagos Gebrhiwet of Ethiopia and Kenyan Isiah Koech both timed at 13:27.26.
"The double was definitely tougher than the Olympic one because last year nobody knew what I was capable of. Today was indeed one of the most important days in my career, but I'm the same old guy," said Farah.
He revealed he overcame a crippling early stitch to defend his world 5000m title.
"Early in the race, I had a big stitch so I was hoping the pace wouldn't go as fast and it didn't. It all went well and I just tried to stay out of trouble.
"I was a lot more heavy than the other guys because they didn't run the 10,000m.
"I thought the race would have gone harder, thinking the guys were thinking 'he's already done 25 laps around the track plus the heats for the 5000m', but it didn't."
Fraser-Pryce's path to victory was made much clearer when three-time world champ Allyson Felix collapsed to the track midway around the bend clutching her right hamstring.
The American was carried from the arena by her brother Wes.
Fraser-Pryce continued Jamaica's sprint dominance in Moscow, clocking a winning time of 22.17 and becoming the first woman since East Germany's Katrin Krabbe in 1991 to do the sprint double at world level.
Only one year after her 1991 double triumph, Krabbe's career was in tatters when she was suspended for three years after testing positive to clenbuterol.
Murielle Ahoure from the Ivory Coast was second on Friday night, with the bronze going to Nigeria's Blessing Okagbare, although both were credited with the same time of 22.32.
"This win took a lot of sacrifice, hard work and commitment," said Fraser-Pryce.
"I used to hate the 200m but now I know whatever I put my mind to I can accomplish.
"It is very unfortunate what happened to Felix, really sad, and I hope she will recover soon," added Fraser-Pryce.
Russian Aleksandr Menkov was a popular and highly deserving winner of the men's long jump.
Any of Menkov's best three leaps would have been good enough to win gold in Moscow or at last year's London Olympics - with his best effort a national record of 8.56m in the second last round.
The minor medals went to Ignisious Gaisah of the Netherlands (8.29m) and Mexican Luis Rivera (8.27m).
The other individual gold medals decided on the seventh night of the championships went to Germany's David Storl in the men's shot put and Tatyana Lysenko from Russia in the women's hammer throw.
