The forward wasn't happy with the coach's decision to disallow one of his goals during a training session.
Cristiano Ronaldo reacted angrily to Rafa Benitez's decision to rule out one of his goals during training on Wednesday.
The 30-year-old was caught gesticulating on camera by television station Cuatro and shouting 'Vai Caralho!' in the direction of the Real Madrid coach.
The term is a Portuguese insult used to express disappointment and was followed by Ronaldo complaining that Benitez "gives everything against the Portuguese".
Later on he could also be seen displaying his frustration towards teammate Alvaro Arbeloa as the team took part in a game where they were required to try and hit the crossbar.