Former Manchester United manager Louis Van Gaal is a difficult man to work with, according to one-time Argentina defender Martin Demichelis.
The 67-year-old coach was in charge of Bayern Munich between 2009 and 2011, managing to guide the club to a domestic double and a Champions League final during his first year.
Demichelis was part of that squad and he looks back on that season fondly, describing Van Gaal as a "great manager", however, he also admits that the two men failed to see eye to eye on more than one occasion.
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"If I tell you about a great manager, but one who is completely crazy: Van Gaal.