Ferreira won silver, while Mira Potkonen of Finland and Sudaporn Seesondee of Thailand both won bronze medals as losing semi-finalists.
Already the first Irish woman to win medals in two Olympics, pride was running high. And then she went for the gold and Diamond Park erupted in thunderous whoops of joy.
'There is more to life than sport and anything can happen in sport, so you need something to fall back on'
Eliud Kipchoge confirmed his status as the Greatest Marathoner of the 21st Century by winning a second Olympic Marathon, only the third runner in history to do so.