Manchester City chief Ferran Soriano has questioned Manchester Unitedâ€™s pursuit of Louis van Gaal.
Holland coach Van Gaal is in talks about the manager's job at United.
Cityâ€™s Spanish chief executive Soriano - who worked at one of Van Gaalâ€™s former clubs Barcelona - believes the 62-year-old is a confrontational coach who risks alienating players wherever he works.
Soriano said: "If you treat your people badly, they remember. One day you make an error and they kill you. Iâ€™ve seen this in many clubs.
"He is very tough, people donâ€™t like him, but he wins. And one day you donâ€™t win â€” and when you donâ€™t win, everybody that is angry with you will come back to you and try to kill you.
"In the movies this works, in real life it doesnâ€™t."
Soriano made his comments at a conference in March, before he knew about Unitedâ€™s interest in Van Gaal.
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