Erik ten Hag and Patrick Vieira led their teams out of the Old Trafford tunnel on Saturday before laying wreaths near the centre circle to commemorate the 65th anniversary of the Munich air disaster.
United welcomed Palace to M16 just two days before the anniversary of the disaster in which 23 people died. Eight United players plus three of the coaching staff were killed in the crash.
Earlier this week, the club confirmed plans to commemorate the anniversary with a minute's silence and the wearing of black armbands.