Liverpool manager Jurgen Klopp is wary of a Napoli side he describes as "stubborn in a very positive way" as the Reds begin the defence of their Champions League crown at the Stadio San Paolo.
The clubs have been drawn in the same group for the second season in a row, with Napoli prevailing in the corresponding fixture last term as Lorenzo Insigne's late strike settled matters.
Liverpool went on to pip Napoli to a spot in the knockout stages - by virtue of scoring more goals after they finished level on points and a number of other determining factors - before going on to lift the coveted trophy.
While the memory of Liverpool's 1-0 defeat here last October burns bright in the memory for Klopp, the German believes his side showed immediate improvement against title rivals Manchester City in their next outing and did not allow their levels to drop for the remainder of the campaign.
"Directly after the Napoli away game last year, it was a game where we had to defend really well and we improved in three days, did everything right that we did here wrong and kept that going for the rest of the season.
Klopp, who revealed Andy Robertson faces a late fitness test after suffering a knock as Liverpool beat Newcastle to maintain their perfect start to the Premier League season, is keen to start afresh in Europe.
He revealed both he and his players are hungry for further silverware and claimed they are feeling no additional pressure of being champions ahead of their Group E opener.