The Serie A champions were humbled by the Blaugrana in the Champions League in midweek, suffering a 3-0 defeat at the Camp Nou.
Undefeated in Serie A so far this season, Allegri wants his side to make amends at the Stadio Città del Tricolore and feels they can't be too down about their efforts in Catalonia.
He told reporters: “Paradoxically, we conceded three goals on our three errors and their counter-attacks. We can learn from that night, though, figuring out what not to do and why we should rely on our own characteristics, not trying to play like Barcelona.
“That’s the only way we’ve got of staying in the game and being able to beat these teams. We are improving physically and tomorrow begins a run of games with Sassuolo, Fiorentina, Torino, then the Champions League again.
“Our only available result tomorrow is victory, albeit aware we are facing a Sassuolo side that plays well, has quality players and above all is in need of points. We need great respect for Sassuolo and humility in this game.”