What is the capital of the country of which Davor Šuker is president of a federation based in said country?
Croatian Football Federation:  It was originally formed in 1912 and is based in the capital city of Zagreb. Davor Šuker: Davor Šuker (] ; born 1 January 1968) is a retired Croatian footballer and the current president of the Croatian Football Federation, a position he has held since July 2012.
Zagreb