Juve go to Portugal needing victory to keep their hopes alive of reaching the Champions League round of 16.
"We know that the only result that counts is victory. We came here to win, we are improving and we can no longer afford mistakes," Alex Sandro said at his UEFA presser.
“We want to show our best, we want to give our best and win the game.
“I played here when I was at Porto, I know some of their players. It's going to be a tough game, but are prepared and ready, we know we'll put in a good performance."
