Jackson, 28, has previously played the role of bridesmaid rather than bride at the highest level, having won successive Olympic bronze medals in the 400 and 100 metres, but she had announced her serious intentions for 2022 at the Jamaican trials, where she won both the 100 and 200m.

And while she had had to settle for silver in the 100m as Shelly-Ann Fraser-Pryce led home a Jamaican medal sweep, Jackson used all her background of speed endurance to hold off the challenge of her 35-year-old compatriot in the home straight.

Jackson came home in a Championship record that has been bettered only by the late US sprinter Florence Griffith-Joyner, whose world record of 21.34 in winning the 1988 Olympic title still stands.

"The fastest woman alive, the national and championships record, I cannot complain," she said. 

"I was not thinking about any time or any records. 

"I know Shelly is probably one of the best curve runners in the world so I knew she was going to go hard.

"I knew that if I wanted to get gold, I had to run the curve as hard as possible."

She added that her victory had been partially motivated by a mistake at last year's Olympics, where she slowed down in the curve and finished fourth in her preliminary 200m heat, failing to progress.

She called it a silly mistake, one she hadn't re-watched a single time.

"I never wanted to because I never wanted it to play on my mind and think it could happen again," she said.

Fraser-Pryce clocked a season’s best of 21.81 to add silver to the world 200m gold she earned in Moscow nine years ago, and was followed home by Britain’s defending champion Dina Asher-Smith, fourth in the 100m, who finished in 22.02.

It was a welcome return to the podium for the Briton whose Olympic ambitions were undermined by a hamstring injury last season, and she will be looking forward with relish to the prospect of earning further glory at the imminent Birmingham 2022 Commonwealth Games and next month’s European Athletics Championships, where she will defend the 100 and 200m titles.

Asher-Smith was followed home by Niger’s Aminatou Seyni in 22.12, with home hope Abby Steiner, the NCAA champion, finishing a long season in fifth place on 22.26.

Double Olympic champion Elaine Thompson-Herah, who has hinted since the start of the season that she is not in peak condition, was seventh in 22.39 having taken 100m bronze earlier in the week.

A fully energised Hayward Field greeted the men’s 200m that concluded day seven with huge approbation.

Lyles, a sensitive soul who has spoken frankly about the mental health issues he had to address in 2020, was bitterly disappointed at his Tokyo showing but has now returned with all his old exuberance to the top of the mountain and it was a beautiful thing to see.

With his mother and brother, fellow 200m runner Josephus, pogo-ing in delight trackside, the 25-year-old from Gainesville, Florida glid over the line with metres to spare, clocking the third fastest time ever behind the 19.26 clocked by Yohan Blake in 2011 and the world record of 19.19 set by the great Usain Bolt in 2009.

To the winner's obvious chagrin, the trackside clock first indicated 19.32, putting Lyles level with the then world record set by compatriot Michael Johnson in winning the 1996 Atlanta Olympic title - but then the time was rounded down.

Confirmation of his new mark prompted the gold medallist to rip asunder his US shirt in triumphant fashion.

"I was very self-concerned about whether that number was going to turn from a '2' to a '1,'" Lyles later conceded.

"I didn't want to see '32,' I didn´t want to share a record," Lyles said of his reaction immediately after the race. 

"Nobody wants to share a record. I think even Michael Johnson doesn't want to share a record. 

"So I was just begging it to change."

Lyles was followed by the compatriot who beat him to Olympic silver last summer, Kenny Bednarek, in 19.77 and, in 19.80, the prodigious 18-year-old Erriyon Knighton, who ran a startling 19.49 earlier this season that put him fourth on the all-time lists, having missed a medal by one place in Tokyo.

"Everybody dreams of this day," said Lyles. 

"But today was my day."

Erriyon reflected: "To be so young and be on the podium, there's more to come.

"Noah Lyles told me I will be one of the greatest in the sport.

"It feels good coming from him."

Five of the eight finalists broke 20 seconds, with new talent Joseph Fahnbulleh of Liberia finishing fourth in 19.84 and the Dominican Republic’s Alexander Ogando clocking 19.93.

Reflecting in December of last year upon his darkest days, Lyles told insidethegames about his liberating decision to take anti-depressants.

"Last year I was diagnosed with depression - I had just been able to handle it really well.

"But as we went to lockdown, the Black Lives Matter movement started increasing, and every day it seemed like I was seeing another young person dying in the street, followed by a school shooting, followed by me not feeling like I could do anything….

"Even practice was hard, and you weren’t getting that energy out.

"Nobody was really happy, everything was really stressful.

"That definitely took me over the edge in terms of how much I could handle.

"You can definitely be in a very strong depressed state and somebody can come up to you and be like, listing off all your achievements, saying you are such and such a person, the fastest person in the world, had the most fastest times, three Diamond Leagues, world champion…and all you are hearing is 'nothing, nothing, nothing'.

"It’s like none of that is important, none of that gives you joy, none of that is likeable."

In the blazing sunshine of Eugene, as his family cavorted, those dark days must have seemed a far away thing for the renewed champion.

Olympic champion and home hope Athing Mu looked utterly composed as she won her 800m heat in 2min 01.30sec, while her fellow-20 year-old, Britain’s Tokyo 2020 silver medallist Keely Hodgkinson was equally assured as she came home first in her heat in 2:00.88.

Algeria’s Slimane Moula topped qualifying for Saturday’s men’s 800m final in 1:45.38, with Kenya’s Olympic champion Emmanuel Korir third fastest in 1:45.38 and his dynamic 17-year-old compatriot Emmanuel Wanyonyi, already the world under-20 champion, fourth in 1:45.42.

Grenada’s world champion Anderson Peters threw furthest in qualification for Saturday’s javelin final, landing the spear at 89.91m, with India’s Olympic champion Neeraj Chopra second farthest on 88.39 and Germany’s Julian Weber, who threw 87.28, was the third best.

Jacob Krop of Kenya was fastest qualifier for Sunday’s men’s 5,000m final in 13min 13.30sec, with Olympic 1500m champion Jakob Ingebrigtsen, beaten to gold at that distance in Eugene by Britain’s Jake Wightman, second fastest in 13:13.92.

World 5,000m record holder and renewed 10,000m world champion Joshua Cheptegei moved through in 13:24.47.

Portugal’s Olympic champion Pedro Pablo Pichardo topped qualifiers for tomorrow’s men’s triple jump final with 17.16m, one centimetre more than Burkino Faso’s Hugues Fabrice Zango.