Founded equally upon technical quality and fierce mentalities, the two teams in red consistently competed for titles and cups as the pendulum swung from Ferguson to Wenger, Keane to Vieira, Giggs to Overmars and back, time and time again.
On this day in 1999, United faced Arsenal in an FA Cup semi-final replay that lived up to every expectation of the two great teams. After a Roy Keane goal was ruled out for offside at Villa Park on the Sunday lunchtime, the sides saw out a goalless draw and the tie went to a replay.
The year before, Arsenal had knocked United off the perch we had so well established in the dominant mid-90s era.