By FOX SPORTS staff
Manchester City's dominant win marked Manchester United's worst result at the Etihad Stadium since 2004, in a game where the Red Devils midfield was completely nullified and lapses in defence cost them dearly.
Without Robin van Persie, it fell to Rooney to get the goals, but the England international could only notch a consolation after their arch rivals put four past David De Gea.
Speaking to MUTV after the game, Rooney admitted that he was bitterly disappointed to have the team on the wrong end of a derby result, but he encouraged the Red Devils set things right against Liverpool in their mid-week Capital One Cup game.
"It's nice to score but it means nothing, the points were the most important thing today [Sunday] and we've come away with none. However, we've got a big game against Liverpool on Wednesday so we'll try and forget about today [Sunday] and move on in that game," Rooney said.
"We've all grown up - whether in Manchester, Liverpool or elsewhere in the world - with local football derbies and it's not nice when you lose one. I've been there myself as a fan and as a player it's never a nice moment. But thankfully we've got the game against Liverpool coming up Wednesday and it's something we are looking forward to now in the hope that we can get the victory to put this defeat to the back of our minds."
United captain Nemanja Vidic echoed Rooney's sentiments and conceded that his side never really got going in the fixture.
"We were 4-0 down and it was really tough. We were never close to winning the game or even getting a draw. It's disappointing but we have to come back. We're down now but from tomorrow [Monday] we'll try to be positive and win the next game and move on," Vidic stated.
"From the first minute they tried to be aggressive. We didn't get in the game from the first minute. Obviously this is what you have to learn and now, the next game, we try to win."