The next best attempt after Chopra's was that of Australia Hamish Peacock as he took silver while she followed by Grenada's Anderson Peters 82.20 assuring him of a bronze.
Both the quartermilers-relay teams failed to win a medal as the women, competing first up, could only finish seventh of 3:33.61. Former India athlete and World Championships bronze medallist Anju Bobby George termed him the most promising young Indian athlete today, while his former coach Garry Calvert termed him a "once-in-a-generation-talent".
It was his stage, and, Neeraj Chopra turned the key performer, his monster opener of 85.50m killing the rest of the field at one go.
It was India's first gold in the athletics events of the current Games. He had become the first Indian athlete to become a world champion in a field event when he clinched gold at the IAAF World U-20 Championships in Bydogszcz, Poland in 2016 after a record throw of 84.69m.
After his world record performance, Chopra said, "When the spear left my hand on that second throw, I had a feeling that this was a special throw".
It didn't matter that Chopra's javelin could only travel a distance of 86.47m in the final on Saturday, 0.1m shorter than his career best.
Since his path-breaking feat, Chopra, although not passing that throw, has stayed within touching distance.
Vikas Kashana, the other Indian in the fray, finished fifth with a best of 77.87m. In August 2017, he won a gold medal at the Asian Athletics Championships in Bhubaneswar with a sensational mark of 85.23m.
Later in the day, Jinson Johnson set a new national record of 3 minutes and 37.86 seconds while taking the fifth spot in the men's 1,500m final. He then extended his lead to 86.47 in his fourth throw, which in fact turned out to be his seasonal best.