The Liverpool boss told Sky Sports: "I'm not too sure if I saw a football match today. It was set-piece after set-piece, long throw. It didn't have a lot to do with tactics, what I said before the game, but I liked a lot how we stood strong. Very difficult first half hour, 45 minutes, but we didn't collapse at all, we stood strong. Going down to 10 men, you would expect that that is a big plus for us, but when a goalkeeper takes every free kick, then there's not so much help if you are one player up, and that's why it was so difficult for us to bring the 2-0 over the line."
Slot admitted that Liverpool created little from open play in the second half but praised the sweeping move that led to Ngumoha’s winner.
"I don't think there was so much open play to be played," he said. "In a set-piece, a long throw-in, a long ball from the goalkeeper, you don't need an extra man. It's always nice to have an extra player on hand, but it's just not as beneficial as if they want to bring the ball out from the back and we can press them. So, yes, with the ball, the one and only attack that was good in the second half, apart from maybe the 2-0, that was the one that led to the goal, which was a great attack. And for the first time, we went from right to the middle to the left, and a great goal for a 16-year-old.
"Maybe it wasn't the best game in terms of tactics or in terms of playing football, but I think every fan everywhere around the world enjoyed watching this game of football, also because their fans were amazing in terms of the help they gave the home team."