Briana Williams, remember the name.
There was a huge upset in the u20 World Championships on Thursday evening as Briana Williams took gold in the 100m final.
Twanisha Terry was the heavy favourite going into the race. The American sprinter set a championship record in the semi-final with a time of 11.03. However, 16-year-old Williams had other plans.
While Terry got caught up in the starting blocks, Williams stormed to an early lead. She powered her way towards the finish line to ensure that her American rival couldn't close the gap in time.
Sure enough, Williams managed to cling on to the lead.
She crossed the finish line first in an impressive time of 11.16. Terry crossed the line 0.03 seconds later to take the silver medal while Kristal Awuah of Britain came in third.
Ireland's Gina Apke-Moses ran a brilliant race to take eighth in a time of 11.64. This was a slightly slower time than her 11.51 in the semis.
