Jagielka, who hopes to win his 17th cap against the Republic of Ireland at Wembley on Wednesday before flying off for a glamour match in Brazil next weekend, is one of the leading contenders alongside Joleon Lescott, Phil Jones and Gary Cahill to be long-term replacements for John Terry and Rio Ferdinand, both of whom have retired from international football.
"There is tough competition in all positions," said Jagielka. "It's not just the centre-backs, even the full-backs aren't guaranteed places these days and I look on that as a positive.
"The squad probably don't have as many so-called top-level players as we've had in the past, like David Beckham. So it could be any one of 30 players starting in August and at the World Cup. There isn't really anyone nailed down. Possibly Stevie but he's getting that bit older and I see him changing his game for England a bit."