Saturday's Manchester derby is the first Premier League meeting between Jose Mourinho and Pep Guardiola but they've faced each another plenty of times in the past.
What, however, have we learned from those matches and will anything gleaned be relevant when United host City?
Both managers make specific plans for this opposition
Mourinho's contests against possession-based managers are often simple, because the approach generally does not change from game to game. This is partly why he has been so successful over the years against Arsene Wenger; Mourinho devised a plan and never needed to readjust.