England coach Fabio Capello says club form is key for his players to staying in his team.
England opened their qualifying campaign with maximum points thanks to wins against Bulgaria and Switzerland and the trio of youngsters all made significant contributions to Capello's new look side.
The Italian said: "People like Lampard, Terry and Ferdinand are important players, but I have to decide the team for our next match against Montenegro in October.
"I will pick players who I think are right at that moment.
"We selected players against Switzerland because of injuries and, as you could see, they were together as a team.
"The competition for places is good and it's important not to be sure that you will play.
"The level of some of the young players is the same as the older players and this means more competition for places. The gap has closed.
"I can see the balance of the squad changing because we have some good young players."
Capello also believes that England are now developing a club-type atmosphere in the dressing room, which is helping the feel-good factor in the dressing room.
He said: "Like a club manager, I have to decide that some players will play and some will not.
"If you want to stay with is, you have to accept my decisions."