While this era's Manchester City side has an impressive record versus local rivals Manchester United in the Manchester Derby, the best run ever for the Blues against the Red Devils was from 1968 to 1974 when City won nine times against Manchester United losing just once and drawing four times. This run culminated with Denis Law's goal that relegated the Red Devils in the final fixture of 1974.
Under Joe Mercer and Malcolm Allison, The Blues turned the tables on former City player Matt Busby's golden generation of Manchester United players. Beginning with Manchester City's 3-1 win at Old Trafford in late March 1968, a win that would lead directly to the Blues First Division title triumph (besting United who did claim England's first ever European Cup that May) Mercer, Allison and Tony Book who transitioned from playing captain to full-time Manager had Manchester United's number.
City's domination was even more complete at Old Trafford. The team went seven games without a loss at Manchester United's home ground, winning six of those meetings. During this period Franny Lee who would eventually serve as club chairman scored 10 goals for the Blues a mark that was a a record in the match-up until broken last season by Wayne Rooney.