Jose Mourinho recently demoted Chelsea’s (female) club doctor.
He did it tactfully, but that in and of itself doesn’t prove his sexism. For that, you have to comb through the last couple of years to find the significant pattern.
There was the time he told Rafael Benitez’s wife to stay in the kitchen.
Or the time he tried to insult Arsenal players by suggesting they weren’t manly enough to play soccer.
Or that one time, when asked who his favorite actress is, when he said men are better actors than women.
Taken together, it adds up to a damning trend.