Son struck in Spurs' Champions League defeat to Juve at Wembley.
Barzagli said: "Son? Player of great quality, I had to try to contain him and it was not easy. I've been better, but not only with Son, but they have formidable players ahead of us but in the end our experience and our aggression prevailed.
"When we had to bring home the result, (Gonzalo) Higuain is a player who can make the difference, even at half-fit it is always better to have him. His goal gave us an extra boost."