Napoli boss Maurizio Sarri felt his side switched off in the second half of their 2-1 Serie A win over 10-man Internazionale on Monday evening.
Gonzalo Higuain scored either side of half-time, while Yuto Nagatomo was sent off for a second yellow just before the interval. Adem Ljajic bagged a consolation goal for Inter in the 67th minute.
And Sarri was disappointed that his team did not put the Nerazzurri away more convincingly as they leapfrogged their opposition to the top of the table.
"We did well not to get discouraged during a difficult moment, so we must do equally well not to get ahead of ourselves now," he told Sky Sport Italia.
"Until the Inter goal we were dominating. In my view we considered it to be a done deal when 2-0 up and got distracted, making the kind of mistakes we don’t usually do. In my opinion, I sensed anxiety."