Manchester City have moved to within six points of Chelsea in the Premier League table after beating Manchester United 1-0 at the Etihad.
It's a fourth successive derby win for the blue side of Manchester, as United suffer their third defeat of the season.
Sergio Aguero hit the vital goal just after the hour mark to secure the three points.
But it was made an awful lot harder for the visitors as Chris Smalling was sent off before the break for a second bookable offence.
United are now in ninth place, and sit 13 points behind league leaders Chelsea.
