Precisely as the Portuguese coach must have thought his fortune wasn't changing, Manchester United managed to inflict Oliver Glasner's team's first home defeat in league competition since February.
The Austrian coach's players started strongly justifiably opened the scoring by way of their forward's repeated spot-kick. Yet they were unable to convert superiority into goals after previously struggling to find the net at Selhurst, Amorim's team countered two times in quick succession through Joshua Zirkzee plus the former Chelsea player.
This represented a difficult day concluding of a long week for the home manager, who observed Ismaïla Sarr limp off with a worrying issue before half-time.
Ruben Amorim may have kept his feelings controlled as he headed down the tunnel right after the final whistle.
The Portuguese coach dismissed parallels involving the two coaches' game philosophy during preparation, while admitting that Palace "simply perform things better than us|aspects superior to ours|elements more effectively".
His response to the lacklustre defeat versus reduced Everton was to change the wide defenders, with Amad Diallo moving to the right flank while the Portuguese assumed Dorgu's position.
Amorim's team probably recognized an opportunity to profit since they possessed additional preparation time and almost went ahead after 43 seconds.
A long throw created confusion inside Palace's defense yet remarkably the former United goalkeeper executed a reflex block near the net to prevent the midfielder.
The close shave functioned as a warning for the home team post the lunchtime beginning which was determined for broadcast purposes.
Soon the chances commenced appearing in quick succession. After missing multiple opportunities on Thursday, it appeared perhaps it wouldn't be Mateta's day when he twice dragged attempts off target in the initial phase.
However during a period when talks over Mateta's contract extension faced delays, it was the France international who found the breakthrough.
Another precise pass from the England international drew the defender toward the tackle following an earlier superb interception to stop the winger, the young defender was forced to foul his compatriot in the penalty box.
Palace's shot-stopper came out in a baseball cap to shield his eyes from the glare yet he'll feel regret enabling Amorim's team to equalise eight minutes following halftime.
The home side was sleeping via a fast United dead ball allowing the forward to bring under control and swivel in the same movement to unleash an attempt that found the top corner.
Following weathering a goalmouth scramble when the Dutchman nearly netted once more in his own net, their afternoon got even better a few minutes later while Zirkzee was fouled near the 18-yard line from the Palace defender.
A temporary uncertainty developed in the defensive wall during Fernandes' delivery the set-piece toward Mount enabling the Englishman to beat Henderson with a powerful drive.
Without Sarr's pace to depend on, Palace could barely muster further attempts while the visitors managed to secure vital three points which moves United move above Palace up to sixth spot.
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