England coach Roy Hodgson is ready to experiment for their friendly with Denmark.
Several players are making a late play for the plane to Brazil, principally Sunderland winger Adam Johnson and Liverpool's Raheem Sterling.
"They have both done very well," Hodgson said.
"We have had them with us in the past. In the wider areas in particular there is enormous competition for places.
"At the moment a lot of places are up for grabs and the good thing in a friendly match is that you are allowed six substitutions so it gives me a chance to air more players than you get in a qualifying game."