I guess Koeman likes Geertruida and Dumfries better in the position. But Koeman's reason for excluding Frimpong (as quoted by @Gupz above) really is bullshit, cause certainly those two aren't better defensively than Frimpong...?Koeman doesnt like him. Not even in the provisional squad... Daley Blind is.
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Good enough for the Bundesliga team of the year but not good enough for the provisional squad.