Jagielka feels for unsettled Everton pal Heitinga
Jagielka said: "It's difficult. He got player of the season last year and had a really strong second half of the season - especially with the cup run which meant he rightly got that award.
"But nobody is assured of their place in this team, and coming back to pre-season the manager obviously had ideas who he was and wasn't going to play - and some people have done really well when they've got an opportunity, while some people haven't had the opportunities they would have liked.
"It's just the way football goes."