As coach of Panathinaikos (in three different spells), he led the team to
UEFA Cup quarter finals in 1987–1988 and he won the double in 1991. Daniil served as head coach of
Greece from 1999 to 2001. He made his official debut as the coach of Greece on 31 March 1999 in an away match against Latvia (0–0), for the
Euro 2000 qualifiers. During his time coaching the national team, Daniil had 14 wins, 8 losses and 8 draws. He faced difficulties in staffing the team, as during that period three AEK players,
Demis Nikolaidis,
Michalis Kasapis and
Ilias Atmatsidis, whom Daniil was considering as starters, abstained from the national team as a protest against the refereeing in the Greek league. ==Death==