A product of the Fenerbahçe youth system, Demiral was signed by Portuguese side AC Alcanenensein in 2016.[2] In January 2017, he was loaned out to Sporting B, and made his professional debut in the Segunda Liga for the latter club on 5 February 2017 in a 1–1 home draw against Famalicão.[3] At the end of the season, he was signed outright by the club.[4]