It was City's fourth straight success since Mancini took over from Mark Hughes three weeks ago and followed a 2-0 win over Stoke City and 3-0 win over Wolverhampton Wanderers in the league and a 1-0 win at Middlesbrough in the FA Cup.
NEWS: Tevez treble fires City up to fourth
After praising hat-trick hero Carlos Tevez, scorer Micah Richards and the rest of his team, Mancini told ESPN: "It was a good night for us, but the team must concentrate for 90 minutes and I am angry because we conceded a goal, it was a gift.
"It's important that we concentrate all the time.
"I was angry because it was a gift, but for me we played very well, we must continue to play well and not concede any goals."
"Now we don't watch the table, we'll watch the table in two months, now it's not important," he said.
"He was fantastic," said Mancini, who also raved about Richards' stunning goal which came after he ran 70 metres from the edge of his own penalty area before laying the ball off to Benjani Mwaruwari who shot against a post.
"It's one of the best I scored, I just kept going and got lucky this time," Richards said.
