Manchester City have outshone Manchester United in recent years but manager Pep Guardiola believes his team are still a decade away from closing the gap on their bitter rivals.
There has been a momentum shift in Manchester since City were purchased by the Abu Dhabi United Group, with the club claiming six major honours since 2011, including Premier League titles in 2012 and 2014.
City's fortunes have been in contrast to United, who have not won the Premier League since Alex Ferguson's departure in 2013 - failing to qualify for the Champions League on two occasions.
However, Guardiola - whose City are third in the table and seven points adrift of leaders Chelsea with United sixth - feels the blue of Manchester must consistently compete in the Champions League if they are to catch their historic rivals at Old Trafford.