The Turin giants booked their place in the last 16 of the competition this week with a 1-0 win at Shakhtar Donetsk which saw them top the group.
"As Gigi Buffon says, being the strongest doesn't always matter," he told the Gazzetta dello Sport. "Being the best at the right moment does
"But at that stage of the competition, anything can happen.
"This has been a long personal journey for me as I've reached this stage for the first time in my career at the age of 31."