C. Ronaldo Juventus Serie A Share Cristiano Ronaldo will teach Italian football how to take penalties BeSoccer 5 years ago 1.4k | Reading time: minutes Cristiano Ronaldo is set for his Serie A debut on Saturday. AFP Juvntus's new star has a conversion rate of over 80% from the spot, while Serie A has been the league that has missed the most penalties for the last two seasons.