We're asking that question after pictures of old players displaying a frightening resemblance to the pair of footballing titans began to do the rounds on social media.
First, we had a picture of what looks like the spitting image of Lionel Messi in an Athletic Bilbao club suit back in 1969 - some years before the six-time Ballon d'Or winner was born.
It's actually Javier Clemente, a former Spanish footballer who played for and later managed Athletic - winning two La Liga titles. But we're sure you'll agree that a young Clemente looks eerily similar to Barcelona's all-time top scorer.
That's not all though, as Ronaldo too has a football doppelganger from the past. Dragoslav Šekularac was a legendary Serbian footballer who scored over 100 goals for Red Star Belgrade.
He also played in Germany with Karlsruher RC, had a stint in France with Paris FC, as well as playing in Colombia, the United States and Canada before embarking on a varied career in management.
Remarkably, there is a link between he and Ronaldo - that's because his grandson Kristian is now playing for Juventus Under 17's and wore the No.7 shirt on his debut.
What a story it would be if he ends up playing in the same side as the Portuguese superstar, said to be his idol, at some point in the near future.
:soccer: #Juventus, le schede sui giovani bianconeri dell'#Under17 :white_circle::black_circle:- Giovani Bianconeri (@GiovaniBN) April 20, 2020
Oggi conosciamo meglio Kristian #Sekularac :grinning::point_down:
:arrow_right: https://t.co/ZlKPrOzp3F pic.twitter.com/TuOb8tKXW4
Anyway, that's enough mind-bending for today...
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