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If Liverpool had played as shoddily as this the last time they faced Napoli then they would not be European champions.

That was at Anfield in December when a Mo Salah goal sent the Reds through to the last-16 at the expense of the Italians, who needed only a draw.

Had Napoli striker Arkadiusz Milik finished as confidently that night as he did here then they would have had that point.

Lorenzo Insigne broke the deadlock at Murrayfield by curling smartly into the far right corner

Lorenzo Insigne broke the deadlock at Murrayfield by curling smartly into the far right corner

Lorenzo Insigne broke the deadlock at Murrayfield by curling smartly into the far right corner

The Napoli native jumped in the air to celebrate putting his side in front in the friendly

The Napoli native jumped in the air to celebrate putting his side in front in the friendly

The Napoli native jumped in the air to celebrate putting his side in front in the friendly

Fabinho reacted in pure frustration as Liverpool continued to show lapses in their defence

Fabinho reacted in pure frustration as Liverpool continued to show lapses in their defence

Fabinho reacted in pure frustration as Liverpool continued to show lapses in their defence

Milik was clean through in the 93rd minute in December only for goalkeeper Alisson to produce an outrageous save that kept Liverpool on course for a sixth European title.

MATCH FACTS: 

Liverpool: Mignolet, Alexander-Arnold (Gomez), Matip (Lovren), Van Dijk (Van den Berg), Robertson (Hoever), Fabinho (Duncan), Henderson (Lallana), Milner (Elliot), Wijnaldum (Lewis), Oxlade-Chamberlain (Wilson), Origi (Brewster)

Unused subs: Lonergan

Napoli: Meret, Di Lorenzo (Hysaj), Maksimovic (Luperto), Manolas (Chiriches), Rui (Ghoulam), Callejon, Zielinski, Verdi (Gaetano), Mertens (Younes), Insigne, Milik (Tutino)

Unused subs: Idasiak, Karnezis,  

Goals: Insigne (17), Milik (29), Younes (52)

But the big Pole made no mistake this time when nonchalantly flicking beyond Simon Mignolet for Napoli’s second goal just before the half hour.

That early lead, nor the 3-0 full-time score, did not flatter the visitors. It said much that Liverpool’s best effort came courtesy of a Napoli defender who inadvertently turned towards his bottom corner and was spared by a diving save from Alex Meret. 

That apart, Jurgen Klopp’s side offered nothing in attack. The midfield and defence weren’t winning any awards either.

There is plenty to be of concern for Klopp right now and the return of Salah, Sadio Mane and Roberto Firmino – all afforded extended breaks – cannot come soon enough.

Yes, pre-season results should be taken lightly but performances less so, and this was a very poor performance. It lacked imagination and energy – the hallmarks of their brilliant season – and was stained further by a worrying sloppiness.

Klopp admits the welcome they received outside Murrayfield was as good as it got.

‘The reception was outstanding, incredible. That was the positive part,’ said the Reds boss.

‘The game was not positive. We conceded simple goals. We lost the ball. You need to have everything better. We need to make better decisions and have a better formation. It was not good.

‘If opponents want to analyse us now then they will say it is an easy job. But we will be a different animal when the season starts.’

Liverpool treated this as a home friendly – even producing the matchday programme – and the welcome the team coach received on its arrival at Murrayfield was as raucous as those seen on Merseyside, the red shirts hanging from the concourse stairwells as the bus crawled towards the stadium’s entrance.

You could have been forgiven, however, for thinking that Liverpool did not turn up at all. The highlight for those supporters was arguably a pre-match rendition of ‘Allez, Allez, Allez’, performed by Jamie Webster from the roof of the stadium.

Arkadiusz Milik (right) scored the second goal of the game to put Napoli in complete control

Arkadiusz Milik (right) scored the second goal of the game to put Napoli in complete control

Arkadiusz Milik (right) scored the second goal of the game to put Napoli in complete control

But the team was going nowhere fast and the tone was set for a woeful first half when, on three minutes, Divock Origi flicked wide from six yards having been picked out by Scotland captain Andy Robertson. 

It was as if Origi, so often the super-sub last season, was not entirely comfortable with this starting role. He’ll be back on the bench soon enough with finishing like that.

He was not the only one guilty of such complacency. Skipper Jordan Henderson was caught napping on the ball and, even when he was more alert, his distribution was errant.

As for Alex Oxlade-Chamberlain, the winger making his way back from a serious knee injury. 

Well, if you’re being kind you would argue he can only get better. If you’re less forgiving then you would worry what impact that devastating injury has had. He looked short of touch, speed and confidence here.

Scottish supporters turned out in force but the stadium went flat with Liverpool well behind

Scottish supporters turned out in force but the stadium went flat with Liverpool well behind

Scottish supporters turned out in force but the stadium went flat with Liverpool well behind

Virgil van Dijk led a defensive inquest after the Reds were easily punished by Napoli's strikers

Virgil van Dijk led a defensive inquest after the Reds were easily punished by Napoli's strikers

Virgil van Dijk led a defensive inquest after the Reds were easily punished by Napoli’s strikers

Amin Younes (centre) scored the third for the Italian side as they continued to dominate

Amin Younes (centre) scored the third for the Italian side as they continued to dominate

Amin Younes (centre) scored the third for the Italian side as they continued to dominate

And all of this showed during a first half in which the outstanding left-winger Lorenzo Insigne led Liverpool a merry dance, and that did not speak well for right back Trent Alexander-Arnold either.

Insigne curled the opener from 20-yards on 14 minutes after Origi lost the ball and Belgium midfielder Dries Mertens set his team-mate clear with a stupendous sliced throughball with the outside of his boot. Klopp was not happy, taking issue with Virgil van Dijk in particular.

But the German boss could not even muster the will to berate his players after Napoli’s second goal, instead standing with his feet spread wide and hands behind his back in a resigned stance of disappointment.

Soon, though, he was on the case of Oxlade-Chamberlain and he bowed his head in despair when an Alexander-Arnold pass whistled straight out of play.

Jurgen Klopp has plenty still to think about with Liverpool enduring a woeful pre-season

Jurgen Klopp has plenty still to think about with Liverpool enduring a woeful pre-season

Jurgen Klopp has plenty still to think about with Liverpool enduring a woeful pre-season

Liverpool's 16-year-old signing Harvey Elliott played his first game since moving from Fulham

Liverpool's 16-year-old signing Harvey Elliott played his first game since moving from Fulham

Liverpool’s 16-year-old signing Harvey Elliott played his first game since moving from Fulham

It was three on 52 minutes after that man Insigne saw his shot parried by Mignolet and the ball bounced to Amin Younes, who prodded in from six yards.

Mercifully, for Liverpool, the Italians eased in the closing stages, for it could well have been more.

One plus did emerge for Liverpool and that was the sight of Harvey Elliot making his debut late on, the 16-year-old having only arrived from Fulham on the morning of the game.

It is his senior comrades, however, who need to sharpen up before next weekend’s opener against Manchester City in the Community Shield.