Sarri spoke to Sky Italia after the 4-0 humiliation last night.
“We are struggling, above all mentally. We had assumed that we learned a certain style of football, but the truth is we never did learn it and are paying the consequences,” Sarri told Sky Sport Italia.
“It was a good first half, but we conceded after the restart and then stopped being a team. We stopped attacking or defending as a team, we did everything individually.
“I don’t understand why that happened, because we had 45 minutes to go and could comfortably have turned the situation around if we’d kept our focus.
“Every now and then this team reacts in a way I cannot decipher, so that creates some uncertainty. Perhaps some of the steps were inevitable, but we need to understand why we have these mental black-outs and what we can do to stop them.”
On doubts around Sarriball, the manager added: “We haven’t even learned the most basic moves yet. We need to work on the basics, the primary foundations of my football, and only then will we try to change a few things.”