Il Corriere dello Sport claims Eto'o's emergence this season has been excellent, but it is one which is causing problems for coach Rafael Benitez.
Players are unhappy and bemused, and Eto'o has been accused of playing for himself.
"There is some selfishness up front," Maicon said after Inter's loss to Roma - a game which saw Eto'o wide of the mark on the night.
And the grumbling is likely to continue with intollerance spreading throughout the dressing room.
Goran Pandev and Wesley Sneijder are said to be unhappy with the Cameroonian.
But with both Pandev and Diego Milito likely to miss the Champions League clash against Werder Bremen, Sneijder could be forced to play behind Eto'o and offer him support.
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