The former PSV Eindhoven star scored on debut in the 4-3 defeat.
He told TUDN: "After my goal at Juve, Ronaldo approached me to compliment me. He said I was welcome in Italy. It was something very nice because he is a spectacular player, the team played very well and we faced great players besides him.
"I didn't do anything in particular. I always have the desire to play. I hadn't talked to the coach but it was very nice that he made me enter the second half in a spectacular stadium.
"I know I have little time, but I hope to succeed thanks to God and the confidence of the coach. My goal is to work and learn both from my teammates and from the coach."