He was a member of the Euro 84 winning team, and alongside Michel Platini, Luis Fernández and Jean Tigana, forming the team's legendary "Carré Magique" (Magic Square) in midfield.
Dia adalah anggota tim pemenang Euro 84 , dan bersama dengan Michel Platini , Luis Fernández dan Jean Tigana , membentuk tim legendaris "Carré Magique" (Magic Square) di lini tengah.