City were irrepressible in beating their crosstown rivals at Old Trafford but England international Milner feels they can improve on that brilliant performance.
"We want to keep improving as a team as well - we can get better," said Milner told the Manchester Evening News.
"You have to keep your feet on the ground but it's also a case of riding the wave as well. We are back in for cool-down training today and then looking at Wednesday (Carling Cup clash with Woles) because we want to do well in every competition.
"The confidence is there and it's about keeping this momentum, putting in good performances and getting the results."