England U21 comfortably defeated Wales 2-0 in last night's friendly in Wrexham.
Huddlestone opened the scoring from the penalty spot, then Walcott doubled the lead for Stuart Pearce's youngsters when his finish deflected in.
Pearce has backed his five players to feature under Capello when they meet up with the senior squad.
"We've got a squad of 31 in the seniors and the bottom line is you might lose a couple through injury - it's a perfect opportunity with the two matches to look at one or two of them.
"If any of these get on the pitch they will do themselves credit."