At the moment when Ruben Amorim must have thought the team's momentum would never turn, Manchester United managed to inflict Oliver Glasner's team's opening Selhurst Park setback in the Premier League since February.
The Austrian coach's team dominated early and deservedly took the lead through the French striker's repeated spot-kick. Yet they were unable to capitalize on their control and having failed to find the net at Selhurst, United struck back with a rapid double through Joshua Zirkzee and the English midfielder.
This represented a difficult day concluding of a long week for the home manager, who saw Ismaïla Sarr depart hurt with a worrying issue in the first period.
Ruben Amorim may have kept his reactions subdued while walking down the tunnel directly following the game's end.
The Portuguese coach dismissed comparisons between the two coaches' tactical approach ahead of the match, though recognizing that Glasner's team "currently execute things better than us|aspects superior to ours|elements more effectively".
The reaction following the poor performance against 10-man Everton meant modifying both wing-backs, including the young winger shifting to the right side with the full-back assumed Dorgu's position.
The visitors likely felt a opening to capitalize given that they had three more days to prepare and nearly scored first within the first minute.
An extended delivery generated disorder inside Palace's defense however incredibly the ex-United shot-stopper made a close-range stop at his goal line to stop the Brazilian.
The close shave functioned as a warning for Glasner's men post the lunchtime beginning that was dictated for broadcast purposes.
Rapidly attempts began to come thick and fast. Following wasted numerous attempts during European action, it appeared could potentially not become the Frenchman's match after he sent shots wide of the target inside the opening 15 minutes.
Yet amid days during discussions about the forward's renewal have stalled, the French striker emerged who provided the first goal.
Another precise pass by the midfielder lured Leny Yoro into the challenge and, having just made a brilliant block to deny Yéremy Pino, the young defender could only bring down his fellow Frenchman within the 18-yard area.
Palace's shot-stopper came out with head protection to protect his vision from the glare but he will be disappointed for permitting the visitors to draw equal post the break.
Palace were caught napping from a rapid Fernandes set-piece enabling the Dutchman to bring under control and pivot in one motion to unleash an attempt that flew into the net.
Following weathering a goalmouth scramble where Zirkzee almost scored again at the wrong end, their day improved further moments after when the Netherlands forward was fouled outside the penalty area by Marc Guéhi.
A temporary uncertainty developed in the defensive wall during Fernandes' delivery the free-kick to Mount and that allowed him to score past the keeper with a powerful drive.
Without Sarr's pace to utilize, the home team struggled to create another chance as United were able to secure vital three points elevating United move above Palace into sixth place.