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.
Sarita Devi, on Sunday, bowed out of the World Boxing Championships
'There is more to life than sport and anything can happen in sport, so you need something to fall back on'
'Sarita is the most abused and unsupported Indian boxer of all time.'
Mary Kom stormed into the quarter-final after beating Kazakhstan's Aigerim Kassenayeva in the second round of the 48kg category of the AIBA Women's World Championships, in New Delhi, Sunday.
The International Boxing Association (AIBA) said it will review the incident.
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.
A judging controversy couldn't stop the Indian juggernaut from rolling with as many as eight pugilists reaching the quarterfinals in the ongoing AIBA Women's World Boxing Championships on Monday.
Rookie Manisha outclasses two-time bronze medallist Christina Cruz