Manchester City striker Sergio Aguero insists they have to maintain a winning habit as they chase Premier League leaders Chelsea.
The Argentine striker scored in the 63rd minute of the derby clash at the Etihad, as Pellegrini's side secured a 1-0 victory over Manchester United.
The win over United left the Citizens in third position with six points behind Chelsea, who maintained their unbeaten run as they edged through a narrow win over QPR at the weekend.
After coming off a back-to-back defeat to West Ham United [in the Premier League] and Newcastle [in the Capital One Cup] to beat Louis van Gaal's side, Aguero told City TV: "It is important to win. Chelsea are doing very well and they keep winning but we have to go on and I'm sure they will drop some points.
"They play at Liverpool next weekend and we will see if they drop points but the important thing is that we have to win games."
Aguero's goal in the Manchester derby was his 10th Premier League goal of the season, making him the league's leading goal scorer but the 24-year-old said: "There is a long way to go," when asked about leading the goal scoring stats.
"It's important to continue like that and it is important that all the goals mean that we win games. I always say that goals are great when they mean victories."