During the waning years of the
Austro-Hungarian Empire, Rupec played ten matches for the
Austria national football team. Rupec was part of the Kingdom's first national team, and had 9 caps, scoring no goals. His final international was at a May 1924 Olympic Games match against
Uruguay. He later coached
HAŠK Zagreb to the national championship in 1938. He died in the summer of 1983 at the age of 87 in Zagreb. ==References==