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MILAN (AP) Cristiano Ronaldo walked off the field and glared at Maurizio Sarri, muttering something undiscernible.
He then stormed down the tunnel.
It was the 55th minute of Juventus' match against AC Milan and Ronaldo had just been substituted for the second straight match after another disappointing performance.
His replacement, Paulo Dybala, went on to score the only goal, helping Juventus to a 1-0 victory on Sunday.
Italian media reported that Ronaldo wasn't around to congratulate Dybala or his teammates, having left the stadium shortly before the final whistle.
''I don't know,'' Sarri said when asked if that was true.