By ESPNSTAR.com staff
Ronaldo bagged a brace in Real's 3-0 win over Granada which included his 150th goal for the club but refused to celebrate the achievement. Later after the match, he cited "a professional issue" as the reason for his behaviour.
"I'm sad because of a professional issue and the club know why," he told reporters.
"That's why I didn't celebrate the goals, because I'm not happy. The people [at the club] know why."
He added: "It's nothing to do with Andres Iniesta [winning UEFA's Best Player in Europe award]. I won't talk about this any more and I will concentrate on Portugal for now. There are more important things [than this]."
"The people at the club know about this. I cannot say any more."
Watch: Highlights: Real Madrid 3-0 Granada... More Videos
Real fans will be looking on anxiously for Ronaldo to resolve this latest issue with the club. The Portuguese has been in ruthless form since joining Madrid with an incredible 150 goals in just 149 appearances for Los Merengues.
He also played a vital role for manager Jose Mourinho last season as Real were crowned La Liga champions.
Regarding his injury, the 27-year-old said: "Let's see if I recover in a couple of days because I want to play in these important games for the national team."
Ronaldo's goals against Granada helped Madrid pick up their first win of the season after they started the defence of their La Liga title with a home draw to Valencia and an away defeat to Getafe.
Ronaldo said on his club's website after reaching 150 goals for Madrid: "I'm very happy for this goalscoring run but the most important thing is the team. We got a victory and for us the league starts today."
Ronaldo's latest comments will almost certainly trigger frenzied speculation on his future at the club by the media.
Read also: Ronaldo inspires Real to victory