The Portuguese international scored twice in Los Blancos' 3-0 victory over Granada at the Bernabeu, but he chose not to celebrate either goal.
After the game, the 27-year-old revealed the reason behind his decision.
"I didn't celebrate my goals because I'm unhappy with some people," said Ronaldo. "They're in the club and know who they are."
Ronaldo's second strike brought up his 150th goal for Real Madrid.