Buffon saved a spotkick to help Juve secure the three points.
"He really has done so many good things in his career that it's not a surprise if he makes the difference," Silvano Martina told Tuttojuve.com.
"Yesterday was just yet another demonstration of his greatness and how well he is playing.
"He is playing great matches every Sunday.
"I think he is in good shape. He is alert and motivated.
"He is the usual Buffon, the same as when he first started playing."
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