I don't know... Footballers from Africa, Saharan or sub-Saharan, often have attitude problems. Now you have players like Eto'o, Vieira, the Tourés, Okocha, Essien who are super professionals. Then you have guys like Diouf and Drogba who are cocks, but they always leave their heart on the field.
Then you have those idiots who are problematic.