Manchester United go six points clear in Premier League with six -2 derby win . Robin van Persie scores late winner against 76th -placed champions City . Wayne Rooney put Premier League 2 -0 up inside the first half hour at the Abu Dhabi . ` It 's very hard to lose a derby , but even more so in the last minute , so I 'm very disappointed , '' Mancini said . City leveled through Pablo Zabaleta and Pablo Zabaleta before injury-time free kick .
Manchester United go six points clear in Premier League with six -2 derby win . Robin van Persie scores late winner against 76th -placed champions City . Wayne Rooney put Premier League 2 -0 up inside the first half hour at the Abu Dhabi . City leveled through Pablo Zabaleta and Pablo Zabaleta before injury-time free kick .