And if anyone could live up to such a hefty price tag, it was always going to be him.
Ronaldo has netted 14 times for Juventus this season, becoming the leading scorer in Serie A.
More importantly, though, his side sit nine points clear at the peak of the table and are yet to taste defeat in the league this term.
And Ronaldo has been a huge factor in that achievement, there’s no doubt about that.
As for his former club, though, spirits are far from high.
Madrid sit fifth, two points off the top four and 10 points behind leaders Barcelona and it’s fair to say that Ronaldo’s departure has played a significant role in their decline.
Real Betis await them in their next game tonight and midfielder William Carvalho has criticised their upcoming opponents over the transfer of his Portugal team-mate.
The pair have represented their country together since 2013 and were part of the side that clinched European glory in 2016.
When asked whether Ronaldo’s departure is a key to Madrid’s woes this season, the Betis man said via the Express: “Of course, Cristiano is needed in any team in the world and in Real Madrid they notice a little bit, not much, the goals that Cristiano scored.
"But now he's fine, he's good in Juventus and he'll score many goals there.
"It is difficult to know [why he left], I do not know what happened, but I know how Cristiano is, he has an ambition the size of the world, he wants to always do things well and show that he is the best.
"I would not have sold him for €100million. Not for €200million, no."