Can't answer your question but you reminded me of how scared I was when I went to Monaco for Champions League semi (without tickets - in the end bought from kids outside the ground) and the Chelsea website said "any Chelsea supporters without official tickets from the club will not be admitted" - walked in nervously, ready to pretend to not speak English (or French!) to find the ground filled with people in the wrong end in the wrong shirts!
Obviously Juventus is a little different! Hope it goes well and you have a good trip - since Monaco I was scarred for life from away games (well that and a proper job getting in the way)