Fabio Capello has described Juventus's signing of Cristiano Ronaldo as a "work of genius" and the "coup of world football".

The Portugal forward brought an end to his glittering nine-year stint at Real Madrid this week by agreeing to join the Serie A champions in a nine-figure transfer.

Although some have criticised Juve's significant transfer and salary outlay on the 33-year-old, former Bianconeri boss Capello believes that the move is fantastic for the Italian game.

"Cristiano Ronaldo's arrival is very important for Italian football, a work of genius for Juventus and for all of Italy," Capello is quoted by Football Italia as saying.

"It also represents an investment that will certainly improve the club on a financial level too. Ronaldo is a money-making machine and brings definite business to Juventus.

"We have to compliment Andrea Agnelli and Beppe Marotta, because getting Ronaldo really is the coup of world football. His arrival also opens the door for Serie A and other champions could follow."

Ronaldo won two La Liga titles, two Copas del Rey and four Champions Leagues during his time in the Spanish capital.