Full Back Demetriou joins on a duel registration deal from Haringey Borough.
Demetriou started his playing career in Cyprus before signing for Scottish Championship side St Mirren in January 2017. After impressing in his short time at the club, he signed a new one-year deal in June 2017. Demetriou helped St Mirren win the 2017–18 Scottish Championship, but was released at the end of his contract. In June 2018 Demetriou signed for Scottish Championship side Ross County. He then moved to Macclesfield Town in January 2019 before joining current club Haringey Borough.
Demetriou has represented Cyprus Under 21’s on a number of occasions and made his senior debut in May 2018.