"We had our moments, but too often the formation was not right or we moved in the wrong spaces", stated Klopp.
"They were calmer than us on the ball, they defended well and stopped us creating chances".
Their XI that night was a far cry from the players we see donning the famous red shirt now.
The hosts defenders pinned back Liverpool's strike force of Roberto Firmino, Mohamed Salah and Sadio Mane.
"That's the second time this season that we have conceded a goal like that, then they were on their bikes, the atmosphere was there because we let them do what they did". When that happens, you can not produce.
"(I'm) not shocked. We didn't adapt, that happens", said Klopp.
"I think Klopp, the more he plays him, is having more faith in Sturridge but the front line picks itself".
Napoli and Liverpool played two games against each other in the 2010-11 Europa League group stage.
"It's a long season with a lot of games, we need everyone and everyone knows that as well, and that's a big strength for us". The result was disappointing for Napoli, who entered the game knowing if they wanted to end Juventus' Serie A dominance, they needed to win.
"We have to blame ourselves, that's how it is".
'It's the game I expected and always do.
Napoli will be looking to register their first three points of their Champions League campaign but will have an uphill task against an inform Liverpool who defeated PSG in their opening game in group C as ever, you can watch all the action on beIN SPORTS CONNECT.