Rubuta ci gaba don wannan sakin layi - A ranar 27 ga Yuni, 2017, bayan dawowa daga Gasar Zakarun Turai ta UEFA ta Under-21
, Fernandes ya koma Sporting CP a kan yarjejeniyar shekaru biyar, don biyan kuɗi na € 8.5 miliyan da kari. Ya zira kwallaye hudu a wasanninsa biyar na farko na Primeira Liga, gami da kwallo a wasan da suka ci Vitória de Guimarães da ci 5-0. Farkon fitowar Fernandes a wasan rukuni na UEFA Champions League ya kasance a ranar 12 ga Satumba, inda ya sa baƙi suka ci 3-0 a minti na 43 na nasarar da suka samu a 3-2 a Olympiacos FC. Ya gama kakar wasa ta farko tare da kwallaye 16 a duk faɗin gasa, na biyu kawai ga Bas Dost.