Cameroon 0-4 Croatia: Benoit Assou Ekotto Headbutts Benjamin Moukandjo (Gif)

Cameroon's World Cup promised acrimony the moment players refused to travel to Brazil over a bonus row, and during their 4-0 thrashing at the hands of Croatia left-back Benoit Assou-Ekotto headbutted teammate Benjamin Moukandjo.

Moukandjo reacts after Assou-Ekotto headbutts him

Alex Song had earlier been sent off for elbowing Mario Mandžukić, and in the heat of Manaus' Arena Amazônia the violence continued. Assou-Ekotto turned on Moukandjo and the pair had to be separated by Pierre Webó.

(GIF via @cjzero)

Cameroon became the third team to be eliminated from the finals, after Australia and holders Spain.

The Indomitable Lions lost their opening match 1-0 to Mexico and face hosts Brazil on Monday.