The attacker became the first player to hit over 100 goals in the competition in 2017 and also holds the record for the most goals scored in the competition in a single season, netting 17 in 2013-14.
In 15 years since his debut in the competition, Ronaldo has scored against 32 different clubs in total, and we want to know how many you can name.
We are giving you 10 minutes, with the number of goals he has scored against each club as some kind of guide.
Good luck, and don’t forget to tweet us your scores at @planetfutebol.
Note: If you have any issues attempting the quiz, try playing it on the Sporcle website.
If, like us, you love a good brainteaser, visit our dedicated quiz page for a host of other challenges.
A massive pat on the back if you get all of these.
Juventus certainly like a good free transfer.
If Lewy leaves Bayern, someone’s in for a treat.
North Korea’s genius ploy unfortunately backfired.
Plus Fernandinho sticks up for Raheem Sterling.
Of course he meant it. He meant everything.
Only eight have lasted longer than five years.
We’re getting a bit bored of this now…
Xherdan Shaqiri always tries elasticos. He’s fun.
Roy Keane was on very good form.