The 28-year-old admitted that the outcome of the tie could have been different had the Scottish outfit drawn first blood in the second leg of the last-16 clash.
"It seemed to be an easy game for us but it was not. If we had conceded an early goal it would have been tough for us tonight," he told reporters.
"I scored both in the first leg and tonight, I am happy especially because I could celebrate it in front of our supporters.
"I still feel hungry for more, of course I would like to play every game but it's not possible. I have to do all I can when I am on the pitch."
Fabio Quagliarella also found the net in this evening's win, helping Juventus claim their place in the quarter-finals of the competition.