Are two-match weeks handled correctly with injury risk?

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I don't have a reserve team and see no option to establish one so a friendly in the middle of the week is kind of necessary. There is no overlap between the players- it's essentially a normal one-match week so I do my training and rest accordingly. Yet the game appears to count a second game for injury risk. Even from FM 17 I've noticed sort of a discrepancy with official two matches per week. With no overlap you'd think you're essentially having a one-match week for your players but more injuries occur.