The Portuguese star may have won the league in his first year in Italy but he told the Belgian it hadn't been easy after his move to Juventus
Inter forward Romelu Lukaku says one of the greatest goalscorers the game has ever seen warned him that Serie A was the hardest place to score in the world.
Cristiano Ronaldo had won championships in England and Spain before adding the Scuddeto last year in his first season in Italy. He, like Lukaku, played for Manchester United, and struck a note of caution when talking with the Belgium international before the start of the season.