In 1929 , Yiannis retired from football , and became Olympiacos ' president for 3 years .
Yiannis was certainly the brother who made the biggest impact towards the club , even becoming a player - coach ; Olympiacos ' first coach , from 1925 until 1927 .
In 1929 , coach retired from football , and became Olympiacos ' president for 3 years .
Yiannis was certainly the brother who made the biggest impact towards the club , even becoming a player - coach ; Olympiacos ' first coach , from 1925 until 1927 .