Are you doing some guesswork again?
Solskjær signed a Norwegian at Cardiff
AVB wanted Moutinho (who I believe wanted to come)
Wenger re-signed Flamini (and have Giroud)
Sherwood wanted British players
Poch signed Osvaldo (which didn't work out).
I could find more if I cared to look beyond my memory.
How can you state that mutual nationality does not come into play, and prove it with a only a highly hypothetical scenario?
I can think of 150,000 reasons (per week) why he will never come
Players, well 99% of them, think with their wallets not their nationality