All of the defensive frailties to have undermined his side’s start to the season in the Premier League were further exposed in the Diego Maradona Stadium, with Liverpool soundly beaten by an excellent Napoli.
Within twenty minutes, Klopp saw his team concede two penalties, one of which was scored by former transfer target Piotr Zielinksi.
Victor Osimhen would miss the second but Giovanni Simeone and Zielinksi put the Serie A side four goals to the good before Luis Diaz’s excellent consolation strike.
The result means Liverpool have won only two of their opening seven games across all competitions, falling behind in six of them.
After a concerning start to the season, Klopp admitted the problems were obvious, although pinpointing the reasons for them is difficult to do.
“Really tough to take, it’s not that difficult to explain when you watched the game,” he told BT Sport.
“To start with the two penalties, OK first of all Napoli played a really good game, we didn’t, that is the first explanation for the defeat.
"They scored one penalty and missed another but the next two goals we served on a plate and we should defend better. 3-0 down having chances but never really in the game. We were not compact defensively or offensively. Until Thiago entered the pitch I cannot remember one counter-pressing situation, we were too wide.
"Everything is obvious but why it happened, I cannot answer now, let me think about about it. It is a really tough cookie to take, but I have to take it."