At the moment when the Portuguese coach likely believed his luck wasn't changing, Manchester United delivered the home side's initial home loss in the Premier League beginning in February.
The Austrian coach's players started strongly justifiably opened the scoring through their forward's second penalty attempt. However they failed to make their dominance count after previously struggling to score against Palace, United struck back with a rapid double through the Dutch forward and the English midfielder.
This represented a difficult encounter finishing of a long week for Glasner, who saw Ismaïla Sarr leave injured with a serious problem before half-time.
Ruben Amorim probably contained his emotions in check when proceeding down the tunnel right after the match's conclusion.
Amorim had played down similarities regarding the two coaches' tactical approach ahead of the match, although he acknowledged that the opposition "are just doing things better than us|aspects superior to ours|elements more effectively".
His response to the disappointing loss against 10-man Everton involved altering both wing-backs, featuring the Ivorian occupying the right wing as Diogo Dalot replaced Patrick Dorgu.
United must have sensed a chance to benefit since they possessed extra rest days and came close to leading inside the opening minute.
A lengthy throw-in generated disorder inside Palace's defense yet remarkably Dean Henderson made a close-range stop on his goalline to stop the Brazilian.
The close shave acted as an alert for the home team following the midday start which was determined for broadcast purposes.
Soon the chances commenced appearing frequently. Subsequent to squandered a hatful of chances during European action, it looked it might not be the Frenchman's match as he pulled attempts off target during the first quarter.
But in a week during discussions about the striker's new deal have stalled, Mateta stepped up who provided the first goal.
One more perfect ball from the England international drew the defender toward the tackle after recently producing excellent defensive stop to prevent the Spaniard, Yoro had to trip his compatriot in the penalty box.
The goalkeeper returned wearing a cap to block the sun from the setting sun but he will be disappointed enabling Amorim's team to draw equal after the restart.
The home side was sleeping via a fast United dead ball allowing the forward to control with his chest and pivot in one motion to unleash an attempt that flew into the net.
Following weathering a frantic moment where Zirkzee almost scored another time defensively, their day improved further shortly afterward while Zirkzee was fouled outside the penalty area by the English center-back.
There was a moment's hesitation in the defensive wall when Fernandes rolled the free-kick to Mount enabling the Englishman to defeat the goalkeeper using a fierce strike.
Missing the Senegal international's acceleration to call on, Glasner's side found it difficult to generate another chance as United were able to complete vital three points which moves United move above Palace up to sixth spot.
Lena Hartwell is a former statistician and lottery enthusiast who now writes about probability and smart play strategies.