Cunha has been away with Brazil this past week.
He said, "I've been very happy to be here for a while, especially now with Ancelotti. We talk about the games at Manchester, the positioning between the lines and without a doubt, we have the freedom to be ourselves and perform at our best on the pitch.
"Even though we don't know how we'll play the next game in terms of formation, everyone feels great. Training is going really well.
"Even though it may seem like he's just picking players for the same position, Ancelotti understands how to get the best out of everyone on the pitch. It's something that makes me very happy and excited to come and perform at my best."
Cunha also said: "One of Ancelotti's greatest strengths is getting the best out of each player. I came to the national team with this stereotype of a number nine shirt. I play my entire base as a midfielder and when I became a professional, I encountered this world of 4-3-3.
"It seems like you have to adapt: either play centre forward, winger, or eight. They eliminated the midfielder position and you have to adapt. However, I view it positively, as it has given me experience in many more positions and even more so in short-term tournaments with the national team. Having a versatile player is a huge help for any coach."