On Friday, Sassuol managed to bounce back from a poor start to beat Udinese 2-0 in the Europa League semi-finals.
Juventus came back to take the lead from the penalty spot after 28 minutes when Alessandro Giorgetti curled in a header from a cross from Daniele Dias.
Sassuolo responded in the second half, with Stefano D’Alessio putting in a cross that went in off the post after Alberto Giorgi went down under the pressure of a cross.
Sagna’s goal was his fourth of the season, but the Italian champions were not able to make the most of their chances, going down 1-0 thanks to an own goal by Lorenzo Mascaro.
Juve went into the match having not lost a match since March 6.