I can make an impression and play some part on Tuesday night."
Asked if he is daunted by the prospect he could become the oldest England debutant since Leslie Compton in 1950 he said: "The age thing is not a concern of mine, I feel as good as I have done since my time at Bolton began.
Capello required a fourth striker to support Wayne Rooney, Peter Crouch and Darren Bent in his squad and the uncompromising centre forward was given the nod.
ConfidentDavies told a press conference shown live on Sky Sports News HD: "I'm confident in my own ability. I always felt I could do a job at this level and it just never quite happened for me for one reason or another.
Head coach Fabio Capello was deprived of a number of attacking options with Jermain Defoe, Bobby Zamora and Gabriel Agbonlahor all out injured.
Age is no issue
"I trained today and I didn't feel overawed at all. There were a few nerves beforehand but the lads have been welcoming."
Capello saw similarities between himself and Heskey, which gives him an edge over other strikers the Italian might have picked for his squad.
behind me and I'm enjoying my football as much as I have done.