Sassuolo fought back from 3-1 down to earn the point.
“There are some positive aspects and some other things that we need to sort out, as we aren't sharp enough and I said the same thing after Bologna," De Zerbi told Sky Sport Italia.
“We never give in and that character means we believe in ourselves and each other. We felt a little bit of pressure going into this round, as a win would've put us in first place, and I was concerned that might happen. Shaking off anxiety is a step that's necessary for a side like ours that wants to dream.
“The quality of the passing becomes decisive, especially when we are up against opponents who plan to allow us more possession. It's all about the details."