Ronaldo had been linked with a move back to the club where he first announced himself as the world's best player for most of last summer.
Ronaldo netted four goals in his first 14 league matches, his poor form one of the reasons Barcelona were able to leave Madrid in the wake during the first half of the season.
The Prime Minister didn't mention why but we think it probably has something to do with the fact that he played for Barcelona, which is one of Real Madrid's biggest rival. "Like us, they have players capable of making a difference at key moments in the game", Madrid defender Raphael Varane said.
On the other hand, PSG have dominated the French Ligue 1.
Madrid languishes in fourth place and 17 points behind Barcelona in La Liga and is out of the Copa del Rey.
"I always look to be at my best level and sometimes things don't go as we like, but experience has taught me that we must continue working hard to achieve our goals", Ronaldo said on the club website.
Klopp insists his side can compete with the continent's elite, having beaten "Europe's strongest football team" Manchester City 4-3 in the Premier League in January.
Ronaldo, Bale and Benzema have a massive partnership that led Real Madrid to win three Champion League titles in 2014, 2016 and 2017.
Porto are unbeaten on home soil in the Portuguese league this season, but they did lose a Champions League game at their Dragao stadium against Besiktas last September.
"CR7" now has 23 goals in all competitions this season, more than at the same stage a year ago.
And ahead of Wednesday's first tie with PSG in Madrid, the Champions League's all-time leading goalscorer said: "We are going to play against a great team with excellent players, which we respect very much".
"They're big-time players and they could turn up and smash PSG, but I think it will actually be the visitors' stars who step up here, with Neymar really relishing the occasion".
"They have fantastic players but we can find the right motivation with our fans".
"I am only thinking about tomorrow's game, not my future".