Ronaldo said this in a series of posts on his Instagram account on Thursday.
The Portuguses captain said: “As I am getting ready for my third season as a Bianconero, my spirit and ambition are as high as ever. Goals. Victories. Commitment. Dedication. Professionalism. With all my strength and with the precious help from my teammates and all of the Juventus staff, we work once again to conquer Italy, Europe and the World.
“Breaking records and overcoming obstacles. Winning titles and achieving personal goals. To do more and better once and again. To reach higher and to succeed in all challenges that may come our way.
“Making every year into an adventure better than the one before and winning everything for our fans and supporters.”
The Juventus number 7 scored 31 goals in 33 Serie A matches for Juventus last season.
The 35-year-old helped the Turin club to win their ninth consecutive Scudetto.