Fernandes made his debut for the club, starting the whole game, in a 0–0 draw against Vitória de Guimarães in the opening game of the season. He then helped Sporting Lisbon beat AC Horsens in the second round of the UEFA Europa League Play–Off Round, in a 5–0 win. However, his first team opportunities was limited, having been placed on the substitute bench and was restricted to twelve appearances in all competitions for the club. After his loan spell at Sion ended, Fernandes was among with many players to be sold.