During his time at FC Nordsjælland, Sulemana established himself as one of the most exciting young talents in Danish football. His pace, dribbling ability, and eye for goal made him a standout performer in the Danish Superliga, and he attracted interest from several top European clubs. In June 2021, Southampton FC secured the signing of Sulemana for a reported fee of around $15 million, making him one of the club’s most expensive signings.