Ghana midfielder Afriyie Acquah scored for Empoli who recorded an emphatic home win over Sassuolo in the Italian Serie A on Sunday afternoon.
Acquah netted his second goal of the season in the 3-0 win at the Stadio Carlo Castellani.
The 27-year-old doubled Empoli's lead before halftime after Krunic had opened the scoring on 34 minutes.
Acquah received a fine pass from Diego Farias and showed brilliant composure inside the box to bury the ball into the bottom left corner.
Farias sealed the win with a fantastic solo effort in the second half.
The victory takes Empoli three points above the relegation zone.