Jagielka feels England can still benefit from the two Wembley losses - particularly if they can learn to adapt to playing counter-attacking teams.
"I only got to play in the second game, but watching the first game, you can see how good a team Chile are," said Jagielka.
"They are a South American team, they have a certain way of playing and you hope to pick up a few bits and bobs which potentially you might come across in Brazil.
"Against Germany, it was difficult to learn too much because they made a lot of changes to their starting XI and we made a lot during the game.
"But on the counter-attack, we have come up against a very special team making some fantastic runs and that is something we will have to take a look into.
"We are still a work in progress and it is all about progression.
"We have some more friendlies coming up before the World Cup, and we know what we need to do to improve."