Jagielka comes up against one of his former managers in Neil Warnock on tonight.
The pair were together at Sheffield United and the centre-back remembers those times fondly.
"He is the sort of character you either love or hate but he was the man who gave me my first big chance," he told evertontv.
"He will always have a special place for me as you don't forget those people who help you in your career.
"You want characters in the game, you don't want to be watching interviews on the telly and switching them off because they are boring and Neil Warnock is certainly not boring."