In December 2017, Fernández claimed his 7th consecutive and 8th overall senior Spanish national title. He hit all planned jumps in the short program to receive 107.73 points, and landed two quads during the free skate before falling on the third to score 180.57 points in the segment and 288.30 points overall. His qualification for the 2018 Winter Olympics was not determined by this event, as it had been announced previously that Fernández would take the first of Spain's two spots in the men's discipline. Fernández announced that the 2018 Winter Olympics in PyeongChang would be his last Olympic Games.