Koman Coulibaly arrived at the 2010 World Cup in South Africa as the best referee of the African Football Confederation (CAF) after in January of that same year he directed the final of the Africa Cup, the maximum continental competition of the CAF, between Ghana and Egypt. However, the FIFA it didn't take long to send it to the fridge after she bundled it up in the match against United States with Sloveniana, in which the Americans blamed the Mali collegiate, who was then 39, for depriving them of the victory by canceling a goal without reason in the 88th minute.
Rarely does FIFA often draw public attention to a referee, but in this case, The highest organization of football called Coulibaly to a hearing to explain the reason why he annulled a goal to the United States., that in the replays seemed completely legal but in which the referee indicated lack of an attacker.
Landon Donovan, captain of the American team, assured after the game that he asked Koulibaly what he had whistled and that he did not know how to answer him. For his part, the coach Bob Bradley he thought the mali was offset by a mistake that would have favored Slovenia on the previous play. Be that as it may, FIFA did not allow Colulibaly to referee again in South Africa and after appointing him as the fourth official Italy-Australia of the round of 16, he sent him to see what was left of the World Cup at his house.