Antonio Ottaiano said that Insigne is keen to impress Benitez in order to get more chances in the Napoli first team.
"I honestly do not understand where this has come from," Football Italia quotes Ottaiano as saying. "There may have been something between the coach and the player during the game, but that was just to give advice.
"It's a completely normal thing. Lorenzo, as always, does what the coach wants him to.
"Napoli are a highly competitive team, and can only field 11 players. There is nothing abnormal about that."
Napoli are currently second in Serie A, five points behind leaders Roma.