1. Roy Keane vs Mick McCarthy
Keane had several complaints heading into the 2002 World Cup ranging from their equipment not being up to standard to having coaching staff that struggled to lead the group properly. Upon hearing this, McCarthy decided to confront the Man United star in front of the rest of the squad. Big mistake. Keane let fly with one of the most vicious tirades ever heard in football (he even told McCarthy to ‘stick it up your b******’) before finding himself on the next flight home.
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