Berahino was left with a shiner after blows were exchanged between teammates following their 3-3 draw with Cardiff City.
The Daily Star says the player who punched him in the face at the weekend was Baggies midfielder James Morrison.
West Brom attempted to draw a line under the incident yesterday but Berahino's frustration that action hasn't been taken against Morrison could now cast doubt on his Baggies future.
Some of Berahino's team-mates are understood to have questioned his attitude and contribution since he landed a huge pay rise from £850 to £20,000 a week.
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