Following John Stones’ injury on Sunday afternoon, the Everton defender will not report to St. George’s Park for England duty on Monday.
England manager Roy Hodgson has subsequently called up Calum Chambers, who was previously due to report to the Under 21s squad.
Chambers will now be part of the senior squad for the Euro 2016 qualifying double header against San Marino and Estonia.
England Under-21s manager Gareth Southgate is not calling any further players into his squad to face Croatia in their Euro 2015 play-off.
Tickets for England’s game with San Marino at Wembley on Thursday can be purchased by clicking here or calling 0844 826 2010