Haaland was the matchwinner from the penalty spot, though insists City deserved another goal scored by Rayan Cherki, which was chalked off and instead Liverpool midfielder Dominik Szoboszlai was sent off.
Haaland said afterwards: "Honestly, first of all Cherki just pass the ball and I score. Secondly, he pulls me and then I pull him and we score so just give the goal and no red card. But the referee needs to follow the rules.
"Third, the penalty, incredible feeling. Fourth, Gigi Donnarumma incredible save. Incredible game and for me, I was so tired after the game. Incredible feeling after the game.
"I said to the referee just give the goal. That's what everyone wanted and I hope that he only gets a maximum of one game because I know you need to follow the rules but for me, just use common sense. For me, you need to follow the rules so I respect the referee."
On his penalty, Haaland smiled: "It had to go in. I didn't score at Anfield but I managed to score now so amazing feeling and I was pretty nervous. The people around me know I am nervous.
"My Mrs knows I am nervous and my father knows I am nervous! But the rest of the people think I am calm which is good. It is not a bad thing to be nervous. It makes you more sharp in the head which is good.
"It is going to be a good trip back to Manchester on the bus!"