"In this league, specially against Tottenham because they are so good with the ball as well, they immediately start to create. And that's what they did, and they scored two goals. I was happy the sixth one went in, to be fair."
The Liverpool boss, who has enjoyed a near-flawless start to life at Anfield, accepted "maybe it is human that if you are 5-1 up, you think 'OK'".
"I exaggerate a bit if I say they don't run anymore," he conceded.
"Of course they still run, but they don't run to crosses anymore, they don't defend in front of the goal, where until that moment it was every time, wherever the ball was, we were there with two, three, four players."
But Slot said his players needed to be more ruthless, telling reporters: "You have to be on top of your game every second of the game. And if you're not 100%, then it immediately hurts you."