Mancini praised Toure who played the majority of the game at right-back - his first appearance since January 3.
"Kolo played very well and did a great job today because he hasn't played for several weeks," he said. "He came on and defended and went forward well so I am pleased for him.
"Today was important because we have taken three points and we need to keep winning because Manchester United is a very good.
"If we could win the next ten games, we would win the title. We just need to keep playing the way we are and we will have a very good chance."