The Reds lost the Community Shield on penalties to Crystal Palace at London's Wembley Stadium on Sunday (10.08.25), and the manager admitted he needs to make some changes ahead of the start of the Premier League season.
Speaking after the game, he told Sky Sports: "It needs maybe a little bit of adjustment defensively...
"We've replaced four players
"You need some time, either to adapt offensively [or] to adapt defensively.
"But against [Athletic Club, in a 3-2 win], we didn't concede one chance at all. Maybe one, I don't know. But we conceded two set-pieces, which are also a big part of football, but that's not from open play.
"I don't feel we conceded that much today, but again, conceded two goals because the first big chance they got resulted in the penalty. And maybe I forget a few chances, but it felt to me that in the 78th minute that was their second big chance of the game. But in general, there were not many chances because they went to a low block.
"We don't concede a lot of chances, but we do concede goals at the moment."
Liverpool were the top scorers in the Premier League last season and had the second-best defensive record and Slot knows they need to build on that.
He said: "What made us really strong last season was we only won mostly by a margin of one goal and that had mostly to do with us keeping a clean sheet or as a maximum conceding one goal.
"Today we scored twice against Palace, last season we were not able to do that once - we beat them 1-0 and we had a 1-1 draw at Anfield. That's the positive."