Just when the United manager likely believed the team's momentum remained negative, the Red Devils managed to inflict the home side's first home defeat in the Premier League beginning in February.
The Austrian coach's players started strongly rightfully went ahead through the French striker's repeated spot-kick. But they could not to make their dominance count after previously struggling to score against Palace, Amorim's team countered two times in quick succession through the Dutch forward plus the former Chelsea player.
The match proved disappointing day concluding following a busy period for the home manager, who saw the Senegalese international limp off with a worrying issue before half-time.
The United manager likely maintained his feelings controlled as he headed toward the dressing room immediately after the final whistle.
Amorim had played down parallels involving the two coaches' strategic methods in the buildup, although he acknowledged that Glasner's team "simply perform things better than us|aspects superior to ours|elements more effectively".
The answer to the poor performance against 10-man Everton was to change the flank players, with Amad Diallo occupying the right wing while the Portuguese replaced Patrick Dorgu.
The visitors likely felt a chance to benefit since they possessed extra rest days and nearly scored first after 43 seconds.
A long throw created confusion in the Palace area however incredibly the ex-United shot-stopper produced a point-blank save near the net to stop the Brazilian.
The near miss served as a wake-up call for Glasner's men following the midday start which was determined for broadcast purposes.
Quickly opportunities started arriving thick and fast. After missing multiple opportunities in midweek, it looked could potentially not become the Frenchman's match when he twice dragged shots wide of the target during the first quarter.
But in a week when talks over the striker's new deal hit obstacles, Mateta stepped up who found the breakthrough.
A further accurate delivery from Wharton enticed the young Frenchman into the challenge after recently producing excellent defensive stop to stop the winger, the 20-year-old had to trip his fellow Frenchman inside the area.
The goalkeeper returned in a baseball cap to shield his eyes from the glare but he will be disappointed to have allowed United to equalise eight minutes following halftime.
Glasner's team was unprepared from a rapid Fernandes set-piece and Zirkzee was able to bring under control and pivot in one motion to produce a shot that flew into the net.
After enduring a frantic moment when the Dutchman nearly netted again at the wrong end, their afternoon got even better moments after when the Netherlands forward was fouled near the 18-yard line by Marc Guéhi.
A temporary uncertainty developed within the barrier during Fernandes' delivery the set-piece toward Mount permitting Mount to score past the keeper with a powerful drive.
Lacking the winger's speed to utilize, Palace could barely muster further attempts while the visitors managed to complete a crucial victory that means United move above Palace into sixth place.
Lena Visser is techjournalist met focus op startups en digitale transformatie in Eindhoven.