Ronaldo was back amongst the goals for victory over Udinese on Sunday.
"He is a champion and when he's needed, he's always there," Nedved said of Ronaldo.
"He had some physical problems and is now back in good form. It's nice to see Cristiano, Dybala and Higuain all playing together, and they can all be on the pitch at once if all three run and sacrifice themselves like they did yesterday against Udinese.
"The coach naturally evaluates the state of form of each one when he makes his choices and, at the moment, they are all in form and you can see it."