"It wasn't unexpected for me," Coach Di Francesco told Sky Sport Italia.
"Even if there were different qualities, our tactical changes, use of strikers to attack them and our approach shows we were not afraid of taking the game to Juventus.
"We had a great attitude and hunger, while we could've scored more goals. I am truly happy for the players, as they work so hard and deserved this night."
Di Francesco is a pupil of Zdenek Zeman and the 4-3-3 system, but for this game moved to 3-4-3.
"I thought if we had played with wide wingers against Juve, we'd be in real trouble. Chiellini, who usually runs with the ball to go through the middle, found his path blocked off constantly.
"I made my three forwards work with the centre-backs and Pirlo. I chose not to man-mark Pirlo, as it would mean us losing a man. If Pirlo doesn't have the ball, Chiellini or Bonucci will take it forward, albeit without the same quality."
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