Sunday was a dark day for the Petrakis family as son Giorgos, 37, was the first to go after his team, former Greek champions Larissa, suffered a shock 5-2 home defeat to local rivals Volos a day earlier.
His father Giannis, 66, was then let go by Panetolikos hours later after an even worse showing, losing 6-0 away to Levadiakos.
It was the most humiliating top-flight defeat in the 99-year history of the club from Agrinio.
Larissa, Greek champions in 1988, currently sit in 12th place in the 14-team Super League 1. Panetolikos are 13th.