Ronaldo, 33, has five Ballon d’Ors to his name and is among the favourites to lift the crown again this year.
And forward Piatek believes Ronaldo is the best player to have ever step foot onto a football pitch.
“Cristiano Ronaldo is the best player in the world right now and in my view the greatest there has ever been,” Piatek said.
Ronaldo has had an ongoing rivalry with Barcelona ace Lionel Messi, 31.
Is Cristiano Ronaldo the greatest player of all time? (Image: GETTY)
Genoa ace Krzysztof Piatek is a rumoured transfer target for Chelsea (Image: GETTY)
The Argentinian has also won five Ballon d’Ors with many unable to split the two in terms of greatness.
Their stats are very similar while both have been hugely successful in club football.
And Ronaldo’s Juventus team-mate Paulo Dybala is surprised at the longevity of the pair.
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