I did it and I shaved myself, ' he told Real Madrid TV.
But their defeat means they have now lost their last five Champions League finals.
It was an unbelievable weekend for Real Madrid as, after being FC Barcelona to the La Liga title, Los Blancos became the first club in the history of the Champions League to retain the trophy.
Coentrao hasn't been seen since the final, as he's shunned the Madrid post match celebrations on Saturday night as well as Sunday's party back in Spain.
Ronaldo's spiky hairstyle has been his trademark look since establishing himself as a global superstar at Manchester United and then Madrid, but the 32-year-old displayed a new buzz-cut style following Los Blancos' triumph.
"I have signed a long term contract at Madrid".
'Happy' Bale aims for more trophies at Real Madrid
The match is set to take place on August 8, four days before the 2017/18 Premier League season is due to kick off. "The truth is it has been a spectacular season", added Ronaldo.
'The first half was much more hard against a great team in all aspects.
"I prepared for this, and we knew that the big trophies are won right at the end". "That is why he is already the best coach in the world".
The Welsh star who became the first player ever in his country to win three Champions League medal on Saturday also added that he was suffering from an ankle problem but now after the surgery, a little more healing and proper rest in the summer will be enough for him to recover fully.
What say you, FC fans: Do you like Ronaldo's new haircut?
After a stint guiding Madrid B, Zidane replaced coach Rafa Benitez when the team was struggling in early 2016, and quickly got it back on track.