Ferrerira began paddling back to the shore with over a minute left as Igarashi was too far behind to best his score.
In the bronze medal match, Australian surfer Owen Wright edged out Brazil's Gabriel MedinaWright, 31, scored a 6.50 on his first wave and 5.47 on his fourth, combining for a match score of 11.97American Caroline Marks was upset by Japan's Amuro Tsuzuki in the women's bronze medal match, 6.80 to 4.26