American Kendra Harrison sent a huge message to US Athletics as she smashed the Women's 100m Hurdles 28 year-old world record at The Müller Anniversary Games in London.
The Olympic Stadium in Stratford was wowed as the US athlete blitzed a strong field and raced to victory, clocking 19.20, breaking Yordanka Donkova's time of 19.21, back in 1988.
Harrison will not be competing at Rio 2016 however, after missing out for Team USA selection having finished fourth at the US trials.
Harrison aimed for World record
Following her omission for selection, Harrison had spoken of turning her disappointment into motivation, stating that trying to get Diamond League points and aiming to get the world record, helped her train harder.
Harrison was just 0.03 off Donkova's record time with her performance at the Prefontaine Classic in Eugene, Oregon earlier this year.
Her accomplishment will be quite the embarassment for the US system, that determines its' selection process solely on one event.
American destroyed world-class field
Harrison won by a distance, accelerating away from the British duo of Jessica Ennis-Hill and Tiffany Porter aswell as all three of her teammates who will be competing at the Olympic Games.
The American trio of Jasmine Stowers, Nia Ali and Brianna Rollins were left in the 23 year-old Tennessee athlete's wake, galloping across the line.
Initially Harrison's time was registered at 19.54. but after a computer malfunction, was rounded down to 19.20, to the disbelief of the field and approximately 90,000 Londoners.
Elsewhere on day 1 on the Games in Stratford, Usain Bolt raced to an effortless win in the men's 200m, the British relay quartet of Asha Phillip, Desiree Henry, Dina Asher-Smith and Daryll Neita broke the British record in the Womens 4x100m relay, Laura Muir cantered to an impressive win in the 1500m and Frenchman Jimmy Vicaut won the 100m in the night's other blue-ribband event.