Juve defeated Inter Milan in Nanjing on Wednesday with Gigi Buffon saving three Inter penalties in the shoot-out.
Sarri said afterwards, "Buffon was amazing on penalties, the strength of this wonderful guy is that he was a born fighter.
"In moments of difficulty, he is always ready.
"He will be held in high regard, but we were immediately clear with him: the starter for us is Szczesny."
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