Just when the Portuguese coach likely believed the team's momentum wasn't changing, Manchester United delivered Oliver Glasner's team's first home defeat in domestic football since February.
The Palace manager's players started strongly and deservedly took the lead through their forward's second penalty attempt. Yet they were unable to make their dominance count and having failed to score against Palace, United struck back two times in quick succession via Joshua Zirkzee and Mason Mount.
The match proved disappointing encounter finishing following a busy period for the Palace boss, who saw the Senegalese international limp off with a serious problem prior to the break.
His Portuguese counterpart likely maintained his reactions subdued while walking off the pitch right after the final whistle.
The Portuguese coach dismissed comparisons between the two coaches' tactical approach in the buildup, although he acknowledged that the opposition "currently execute 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, featuring the Ivorian shifting to the right side while the Portuguese took over from Dorgu.
The visitors likely felt a chance to benefit since they possessed three more days to prepare and nearly scored first after 43 seconds.
A long throw created confusion inside Palace's defense yet remarkably Dean Henderson produced a point-blank save at his goal line to stop the Brazilian.
The close shave acted as an alert for Glasner's men after the early kick-off that was dictated for broadcast purposes.
Rapidly attempts commenced appearing in quick succession. After missing numerous attempts on Thursday, it seemed like it might not be Mateta's day as he pulled attempts off target during the first quarter.
But in a week when talks over the forward's renewal faced delays, Mateta stepped up who found the breakthrough.
Another precise pass from Wharton drew the defender toward the tackle following an earlier superb interception to deny Yéremy Pino, the young defender could only bring down Mateta within the 18-yard area.
Palace's shot-stopper came out with head protection to protect his vision from the glare however he'll experience frustration for permitting the visitors to equalise eight minutes after the restart.
Palace were caught napping from a rapid Fernandes set-piece and Zirkzee was able to control with his chest and pivot in one motion to generate a strike that flew into the net.
Having survived a frantic moment as the forward came close once more in his own net, their situation enhanced shortly afterward as the Dutch attacker was fouled outside the penalty area by Marc Guéhi.
A temporary uncertainty developed among the defenders when Fernandes rolled the free-kick to Mount enabling the Englishman to score past the keeper via a strong shot.
Lacking the winger's speed to depend on, Palace could barely muster further attempts as United were able to see out a crucial victory elevating the Red Devils climb above Palace into sixth place.
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