Manchester City manager Manuel Pellegrini has claimed that Sergio Aguero can make the difference against rivals Manchester United tomorrow.

United travel to City tomorrow having won the last two Manchester derbies at the Etihad Stadium.

Aguero did get the winner at Old Trafford in April, and Pellegrini believes that he can be the difference once again.

"Sergio is very important, he is an incredible player," Pellegrini told reporters. "He makes a difference in every game he plays.

"He didn't do a very good pre-season because he had a lot of problems but now every game he is playing better.

"I am sure he will play a very good game on Sunday because Sergio always appears in important games."

United travel to City at 4pm tomorrow.