FIBA Europe
As a member of the Greek junior national teams, Agravanis played at the following tournaments: the 2010 FIBA Europe Under-16 Championship, the 2011 FIBA Europe Under-18 Championship, the 2012 FIBA Europe Under-18 Championship, the 2013 FIBA Europe Under-20 Championship, and the 2014 FIBA Europe Under-20 Championship.