Massimiliano Allegri was angry with the way Juventus squandered a lead and defended his decision to keep Dusan Vlahovic on the bench in a 1-1 draw at Fiorentina.
Arkadiusz Milik marked his first Juve start by scoring his second goal in as many games at Stadio Artemio Franchi, but that proved to be a false dawn.
Christian Kouame equalised with a goal on the break after Weston McKennie passed when he should have tried his luck at the other end.
Mattia Perin saved Luka Jovic s penalty late in the first half after Leandro Paredes was adjudged to have handled in the penalty area on his Bianconeri debut.
Allegri withdrew Angel Di Maria at half-time as a precaution and opted to send on Moise Kean rather than in-form ex-Fiorentina striker Vlahovic as Juve made it five Serie A matches without defeat this season.
Juve head coach Allegri was not impressed with the manner in which his side were caught out for Kouame s strike.
First start, another goal
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He said: Getting angry is an understatement, you should not concede that goal. At that moment we had to kill the game.
Allegri added: In the second half we dropped [back], but the thing to improve absolutely is that when you have the ball when leading.
From that ball [from McKennie] then came the corner [for Juve] and the 1-1, which changes everything.
Vlahovic had scored four goals in as many games but Allegri felt he needed a rest ahead of a Champions League opener at Paris Saint-Germain on Tuesday.
He said: He had played several games and Milik could give us an extra hand. We wanted him to rest, then there were some forced changes.