The Englishman took part in the Champions League quarter final first leg in Madrid.
The two teams played out an intense and pulsating 3-3 draw at the Santiago Bernabeu.
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Bellingham was upset at how he was tackled by Ruben Dias during one period of the game.
He was also angry at the referee for other incidents, with his anger boiling over at full time.
Bellingham appeared to head straight for the referee after the final whistle to complain.