I would be more concerned with yellow cards and risk of suspensions.
I think yellows only get wiped off after the quarter finals, and two yellows is an automatic one game suspension.
The problem with protecting Kieffer (on a yellow) is that there is no one else in the squad to play No 9. If he is 'rested' then Page will have to go back to the other formation - with a false 9 and wing backs.
I also wonder how much the score in the other match will affect decisions on substitutions and whether to risk players later in the game. If Turkey are well ahead at half time and second place looks secure, Page may become very risk averse.