Benevento now have 11 points from ten games.
“I am really happy," Inzaghi told Sky Italia after the match.
“We had 7-8 important players out of action but I didn't want any excuse before the game.
“It was a game I feared. When I saw Bruno Alves and Hernani I thought their physical strength could have been a problem for us but in the end we didn't allow a single shot on target.
“We can take satisfactions playing this way, taking all the three points today would have been important."