Jurgen Klopp has conceded that Liverpool were not good enough in their 1-0 Champions League defeat to Napoli in the Stadio San Paolo.
Lorenzo Insigne's goal 30 seconds from the end of normal time was enough to defeat a lacklustre Reds side that had failed to register a single shot on target in a Champions League match since 2006.
"No attempts on target, I don't remember when that happened last time," Klopp told Sky Sports.
"I think we had a big part of that because we can play much better. No shot on target is not enough. They had a good game, we didn't, that's what they deserved the three points.
"For the exact reason I am not 100 per cent cent sure. A big part of that performance was my fault for sure but I need at least one night to watch it again and see what was the fault but it was not like it should have looked.
"I am pretty sure the reasons will be obvious and then we will sort that but tonight we were not good enough and normally if you are not good enough you lose games.
"The start of the game was OK then the timing for our defensive movements were not good enough, we didn't close the spaces in the right moment, we didn't react in the right situation so they could play through our formation.
"Things like this happen but not as often as they did tonight and it costs energy. Then when you have the ball you have to play much calmer.
"If you looked how we played you would have thought they were always on us - we could have played calmer but we didn't.
"The first half was kind of OK but the second half was not good enough and it's always a bad sign to say when your goalkeeper is your best player.
"In the 89th minute we make another tactical mistake, we didn't close the gap between Joe (Gomez) and Virg (Virgil van Dijk), and then we cannot react anymore."