Manchester United turned on the style late to beat Swansea but were made to work for their second 4-0 win of the new Premier League season.

Goals from Eric Bailly and, for the second consecutive weekend, Romelu Lukaku, Paul Pogba and Anthony Martial, saw United back up their opening thrashing of West Ham with another impressive result.

But Swansea put up much more of a fight before three goals in four minutes in the final 10 added the gloss that for much of the contest was lacking.

Swansea vs Manchester United player ratings Show all 22 1 /22 Swansea vs Manchester United player ratings Swansea vs Manchester United player ratings Łukasz Fabiański - 6 Unlucky to concede from Bailly after a sublime save from Pogba’s header. Helpless for United’s second and third goals. Getty Swansea vs Manchester United player ratings Federico Fernández - 6 Came up with a crucial defensive header to deny Romelu Lukaku what would’ve been an almost-certain goal. Getty Swansea vs Manchester United player ratings Kyle Bartley - 4 Missed the target with two good headed opportunities in the first half. Swansea vs Manchester United player ratings Alfie Mawson - 5 Almost gifted Marcus Rashford the opener in the first half but was let off the hook by a poor finish. Swansea vs Manchester United player ratings Roque Mesa - 5 A decent debut but it will take him a while to adapt to the frantic pace of the Premier League. Swansea vs Manchester United player ratings Kyle Naughton - 5 Played at wing-back in a new Swansea formation but didn’t have many opportunities to get forward. Swansea vs Manchester United player ratings Leroy Fer - 5 Unspectacular in the middle of the park. Swansea vs Manchester United player ratings Tom Carroll - 6 Some top-class set pieces and has the right to be annoyed at his teammates for not converting. Swansea vs Manchester United player ratings Martin Olsson - 5 Like Naughton, couldn’t get forward as much as he would’ve liked as United dominated possession for the majority of the match. Swansea vs Manchester United player ratings Tammy Abraham - 5 Quiet and missed his one good chance with a header on the hour mark. Swansea vs Manchester United player ratings Jordan Ayew - 7 Swansea’s most threatening attacker and might’ve had a couple of assists to his name if Tammy Abraham had taken a few more risks. Swansea vs Manchester United player ratings David De Gea - 6 Relatively untested but almost caught out by Ayew mishit early on. Getty Swansea vs Manchester United player ratings Antonio Valencia - 7 Another dependable performance from the Premier League’s best right-back. Swansea vs Manchester United player ratings Phil Jones - 8 Looks to be turning into the defender Sir Alex Ferguson hoped he would be. Another serene display at centre half. Getty Swansea vs Manchester United player ratings Eric Bailly - 7 A few clumsy moments at the back but nothing terminal and was alert to score the opening goal. Swansea vs Manchester United player ratings Daley Blind - 7 A solid stand-in at left-back but nowhere near as good going forward as his right-sided counterpart. Swansea vs Manchester United player ratings Paul Pogba - 8 Lost his rag a little in the first half and was perhaps lucky not to be sent off but played a vital role in three of United’s four goals. Swansea vs Manchester United player ratings Nemanja Matic - 7 Mr Reliable at the base of United’s midfield. Swansea vs Manchester United player ratings Juan Mata - 6 Substituted with 25 minutes to go and was probably United’s least effective front-six player on the day. Getty Swansea vs Manchester United player ratings Henrikh Mkhitaryan - 8 Two assists for a second week in a row. Swansea vs Manchester United player ratings Romelu Lukaku - 7 Did nothing for 80 minutes before wrapping the game up with a clinical left-footed finish. Getty Swansea vs Manchester United player ratings Marcus Rashford - 7 Was United’s brightest spark in the first half but didn’t have the same impact after the break. Getty

Two 4-0s, two clean sheets, two wins.

Here's what we learned:

1. 4-0 again but not the same from United

Bailly got United going (Getty)

United were sensational last week in putting West Ham to the sword but for the majority of their second outing of the season it was a performance a lot more 2016 than 2017. Much has been made of Mourinho's apparent shift from his habitual defensive style to a more offensive mindset, but this afternoon's display lacked nearly all of the vim and vigour of last weekend.

The Portuguese kept the same eleven who romped over the Hammers but, for 80 minutes at least, gone was the pace and power of last week, replaced instead with the slow, possession-heavy play of last term. Marcus Rashford was bright - more on him shortly - but the rest of the side struggled to make an impact. Lukaku lacked service as both Juan Mata and Henrikh Mkhitaryan failed to find space in the final third while Pogba couldn't grab the game as he did so impressively last Saturday.

Despite the exact same result this felt like a step back for United after last week's impressive opening. They got their goals late as Swansea collapsed after Lukaku made the game safe but the scoreline doesn't fully tell the story of what was a much more ponderous afternoon at the office.

2. Rashford impressive again

Rashford was bright once again for United (Getty) (AFP)

£75m new boy Lukaku took the headlines last week - and so he should have after a brace on debut - but it was Rashford who really caught the eye. Spin forward six days and the young England man was once again the one to watch as United's main attacking threat.

This United side, although a little more subdued this week, is an altogether more fluid unit this season and with Nemanja Matic once again looking good meshing things together in the middle the front three are afforded the freedom to interchange as they see fit. Rashford is key to this.

Time and again he moved into space with Lukaku moving out wide and always most likely to break something open for the visitors. It wasn't all good and he did snatch at a couple of inviting chances but the 19-year-old looks at home in Mourinho's system and, even with Martial pushing him from the periphery, should be in for a long run in the side.

3. How do Swansea replace Sigurdsson?

Carroll impressed in a more advanced role (Getty)

When you lose nine Premier League goals and a further 13 assists you could be forgiven for looking to the transfer market to replace them. But Paul Clement could do well to look in house at just who will step into Gylfi Sigurdsson's shoes.

On Saturday's evidence Tom Carroll, Roque Mesa and Jordan Ayew could all do the job that the Icelandic star has now vacated. Now, clearly not one of that trio are capable of carrying such a burden alone but between them showed they could, if given the opportunity, help bridge the gap together.

Carroll in particular looks at home closer to the opponent's goal and was central to everything the Swans did well. Mesa is a shrewd addition as a tempo setter at the heart of midfield while Ayew, an often frustrating watch, seems more at home in his second season in south Wales and was bright on the occasions the home side pressed United back and came closest to scoring early when he nearly caught David de Gea out with a smart piece of play.

Sigurdsson is a seismic loss, and will still likely see one or more come in in his stead, but Clement has resources already at his disposal worth a second look.

4. Pogba's up and down afternoon

Pogba endured an up and down afternoon (Getty)

As did many of his teammates, Paul Pogba looked excellent against the hapless Hammers a week ago but cut a more frustrated figure here at the Liberty Stadium. The Frenchman is a wonderful player on song and has all the tools to take over games such as these. But, shackled by an excellent game plan from the home side, he had a difficult afternoon, unable to fully impose himself on proceedings until the game was already sealed.

Swansea did a good job on him and exposed his more reckless side with some old fashioned tactics with the 24-year-old perhaps lucky to escape a second booking in a particularly feisty 10 minute period in the first half.

The sky is the limit for Pogba, and he took his goal with delicious aplomb, but this was another example of the growing pains he still must endure if he's to fulfil that immense potential.

5. Who are Swansea?

Clement has work to do (Getty)

Swansea were lucky to escape with a point from Southampton last weekend after facing a frankly ridiculous 29 shots on goal but, until the closing 10 minutes, the home side were a much more solid outfit. The back three, complete with the returning Kyle Bartley, who was excellent, appeared to suit them with both Alfie Mawson and Feda Fernandez showing up well alongside.

And then came Lukaku's goal and the sky fell in.