Crouch replaced Spurs team-mate Jermain Defoe at half-time and managed to score two goals in England’s 3-1 win at Wembley.
Capello said: “Peter Crouch is in one good moment of form. He played very well but it was not only he who played very well. All the team played a good game.
“Crouch is one of the important players and he has played a lot of matches for me. He is in an important moment of form but when I select the squad I will tell you all the players can play.
“I wanted to see today what happens with Rooney and Defoe. I know what happens when Rooney is with Crouch and Heskey and Carlton Cole. It is important for the World Cup to see how they can play together.”