Manchester United 4 Crystal Palace 0

Mata sent United en route to another three points after just three minutes, latching on to Marcus Rashford's cross, before Fellaini converted Ashley Young's delivery just after the half-hour mark.

The big Belgian then grabbed his second at the start of the second period, nodding in Rashford's wicked free-kick, before Lukaku completed the rout late on by tapping in from close range. At the other end, David De Gea's clean sheet means the Reds have now equalled the club's best-ever clean sheet record at the start of a Premier League campaign.

Phil Jones, Antonio Valencia and Fellaini were all fit to start, while Rashford and Mata also returned to the starting XI, and it was the latter who repaid Mourinho's trust in him after just three minutes.

Arriving into this one on the back of a trip to Russia meant the Reds could perhaps have been forgiven for a sluggish start, but Mata had other ideas, as he tucked in Rashford's pull-back after the young prodigy had turned Joel Ward inside out before handing it on a plate for the Spanish playmaker to tuck home.

United seemed to take the foot off the accelerator as the first half wore on. That allowed Roy Hodgson's men to enjoy a flurry of corners, before De Gea was tested for the first time via a powerful effort from Bakary Sako, which the Spaniard did well to palm away.

Then, it was as if the United players had told themselves 'enough was enough' as, against the run of play, the Reds doubled the lead via Fellaini, who volleyed home Young's pin-point cross at the back post.

The Reds effectively killed the contest early in the second half as Rashford swung in a dangerous free-kick from the left, which was diverted in via a glancing header from Fellaini.

Young tried his luck from 20 yards, while at the other end Sako miscued a header before blazing over from 25 yards as Palace looked to grab their first goal of the season.

Lukaku almost netted his 11th goal of the campaign in all competitions when he dragged a shot wide from 15 yards; however, the big striker was not to be denied moments later as substitute Anthony Martial played his impactful part once again, pulling the ball back for the Belgian to equal Cole's mark.