At the moment when the Portuguese coach must have thought the team's momentum wasn't changing, his side secured the home side's initial home loss in league competition beginning in February.
The Palace manager's team dominated early justifiably opened the scoring by way of the French striker's repeated spot-kick. However they failed to convert superiority into goals and having failed to score against Palace, United struck back with a rapid double via their summer signing and Mason Mount.
This represented a difficult encounter finishing following a busy period for the Palace boss, who observed his winger limp off with a serious problem in the first period.
His Portuguese counterpart likely maintained his feelings controlled when proceeding off the pitch directly following the final whistle.
The Portuguese coach dismissed comparisons between his and Glasner's tactical approach in the buildup, while admitting that the opposition "currently execute things better than us|aspects superior to ours|elements more effectively".
The answer to the disappointing loss against 10-man Everton meant modifying both wing-backs, featuring the Ivorian moving to the right flank with the full-back assumed Dorgu's position.
United must have sensed a chance to benefit considering they enjoyed additional preparation time and came close to leading after 43 seconds.
A long throw generated disorder inside Palace's defense yet remarkably the former United goalkeeper produced a point-blank save at his goal line to stop the Brazilian.
The narrow escape served as a wake-up call for Glasner's men post the lunchtime beginning which was determined by TV requirements.
Rapidly attempts started arriving frequently. Subsequent to squandered a hatful of chances in midweek, it appeared perhaps it wouldn't be Mateta's day when he twice dragged efforts missing the goal inside the opening 15 minutes.
But in a week when talks over Mateta's contract extension hit obstacles, the French striker emerged who found the breakthrough.
Another precise pass from the England international enticed the young Frenchman into making contact following an earlier superb interception to stop the winger, the 20-year-old had to trip his fellow Frenchman within the 18-yard area.
The goalkeeper returned with head protection to block the sun from the glare yet he'll feel regret to have allowed United to equalise eight minutes following halftime.
Palace were caught napping from a rapid Fernandes set-piece and Zirkzee was able to bring under control and pivot in one motion to generate a strike that sailed into the far corner.
Following weathering a chaotic situation where Zirkzee almost scored another time defensively, their situation enhanced moments after when the Netherlands forward was tripped on the edge of Palace's box by Marc Guéhi.
A brief pause occurred in the defensive wall during Fernandes' delivery the dead ball to the midfielder and that allowed him to defeat the goalkeeper using a fierce strike.
Without Sarr's pace to utilize, Glasner's side found it difficult to generate further attempts as United were able to see out a crucial victory that means the Red Devils climb above Palace into sixth place.
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