Two controversial goals helped City to a 4-1 win.
Zabaleta said: "I think they are probably one of the best teams in the league, for sure.
"I think we must give them a lot of credit because they are having a great season, they played really well.
"We didn't play our best in the first half but then we came back stronger.
"We had the control of the ball in the second half. We scored four goals and that is great for us."