Making his debut in September 2020, Doku scored on just his second appearance.
His interesting profile also catches the eyes of the national manager, Roberto Martínez, and his scouts.
Chelsea winger Callum Hudson Odoi, who currently has three senior caps for England at senior level, could benefit from the proposed rule should it come into force and the player be willing to look to Ghana, having fallen down The Three Lions pecking order in recent times.
It might also be the consequence of a unique playing style.
Few would have imagined that his first season in France would be one of such intensity.
Interestingly, the Jérémy Doku of Belgium plays predominantly on the opposite side to the one of Rennes.