The Old Lady suffered their second home defeat this season against Sassuolo.
“We should have been more organized, especially at the end of the match. These are games that you can’t lose if you see that you can’t win,” Allegri told DAZN.
“We must reflect on how we handle games, we can’t concede that goal on a counter-attack. We had several chances to score, but if you are not clinical, everything becomes more difficult.
“Regardless of it, we were too frantic at the end of the match and it can’t happen. It’s not a physical problem, it’s more down to mentality,” the Tuscan tactician continued.
“We didn’t suffer as much as tonight against Inter on Sunday, we were calmer, tonight we were too frenetic.
“Sassuolo have great technical skills, they play well on the counter-attack.”
Weston McKennie levelled the score in the second half and Allegri thought Juventus could win the game at that point.
“We had the momentum on our side. McKennie played a good game, Bentancur has the same characteristics,” he said.
“It’s not a problem of players, it’s a problem of mentality. Juventus never concede goals like today, it must not happen again.