Raphinha and Robert Lewandowski each scored twice as a rampant Barcelona dumped Newcastle United out of the Champions League.

Newcastle head coach Eddie Howe had hoped his players would grow rather than shrink in the Nou Camp cauldron, in the second leg of this last-16 tie.

The visitors certainly showed immense spirit to twice equalise through the rapid Anthony Elanga in a competitive first half and cancel out goals from Raphinha and Marc Bernal.

Howe's men were very much still in the tie at the break - even after Lamine Yamal's penalty put Barca 3-2 in front in first-half stoppage time.

But the visitors fell apart after the restart and goals from Fermin Lopez, Raphinha and a double from Lewandowski ended their European adventure in sobering fashion.

Newcastle were ultimately left to rue the cost of some poor defending, and their night got off to the worst possible start when Barcelona capitalised on a couple of costly slips and Raphinha slotted the ball into the bottom corner after playing a one-two with Lopez.

But Newcastle quickly rallied and Elanga coolly drew his side level from close range after getting on the end of Lewis Hall's drilled cross to the back post.

Those elated Newcastle supporters in the away end were not celebrating for long, though, after Raphinha floated a free-kick into the box and Gerard Martin headed the ball back across goal to the unmarked Bernal, who hooked it past Aaron Ramsdale.

Yet there were plenty more twists to come in this topsy-turvy first half and Newcastle equalised once again after Harvey Barnes picked out Elanga at the back post and the Swede finished first-time to stun the Nou Camp.

However, Barcelona were given the chance to retake the lead in first-half stoppage time after Kieran Trippier was penalised for pulling Raphinha back inside the box following a video assistant referee (VAR) intervention.

Up stepped Lamine Yamal to score from the spot - just as the nerveless 18-year-old did in the first leg at St James' Park.

Barcelona then opened up a two-goal lead just minutes into the second half after Raphinha's exquisite first-time pass sent Lopez galloping away and the Spaniard slotted the ball past Ramsdale.

The tie then got further away from Newcastle when Lewandowski headed home from Raphinha's corner before grabbing another with a drilled finish.

Raphinha made it 7-2 on the night and 8-3 on aggregate after capitalising on a sloppy pass from Newcastle midfielder Jacob Ramsey.

Barca will now meet either Atletico Madrid or Tottenham Hotspur in the quarter-finals.

Could this be Barcelona's year?

This was certainly a statement result from the five-time winners, who really are a force to be reckoned with at the refurbished Nou Camp.

Newcastle may have drawn 1-1 against Flick's team in the first leg, but defender Pau Cubarsi predicted "it will be different in our stadium tomorrow with our fans behind us".

So it ultimately proved.

It is rather telling that only one side have defeated Barcelona on home soil this season - Paris St-Germain, the Champions League holders - and few teams will relish coming up against this attack.

Lamine Yamal will always garner attention, but it was Raphinha who Newcastle could not live with on Wednesday night.

The red-hot Brazilian scored a double, set up two more and won his side a penalty during a man of the match display.

It was a talismanic performance from the man wearing the captain's armband.

This could have been an awkward night for Barcelona after Newcastle twice equalised, but Raphinha helped them take control of this game.

It was ultimately so comfortable for Barcelona that supporters started a Mexican wave.

It is not often that happens in a knockout tie.

Newcastle were behind but very much still alive.

Howe's side may have been 3-2 down on the night, but they were far from out of it at half-time.

This critical period gave Newcastle the chance to regroup and gather their thoughts. Instead the visitors lost their heads on a painful night.

Where do you even begin to start with Newcastle's awful defending?

Newcastle kept a rare clean sheet against Chelsea at the weekend, but there is a reason this side have only kept one shutout since February.

As devastating as Barcelona were, Newcastle's defending made it easy for Hansi Flick's team.

Hall and Malick Thiaw were punished for slips in the build-up to Raphinha's first while Dan Burn was furious with his team-mates for their poor marking at a set-piece for Bernal's second.

Yet leaky Newcastle got even more porous after the break.

There were huge gaps for Barcelona to exploit for Lopez's fourth while Lewandowski got ahead of substitute Tino Livramento far too easily to make it 5-2.

Thiaw failed to cut out Lamine Yamal's pass to Lewandowski for Barcelona's sixth and Ramsey played a dangerous ball across his own box that Raphinha pounced upon for the hosts' seventh goal.

By that stage, Newcastle will have just wanted to get on the plane home.

It was a bruising end to what has been a memorable campaign in Europe for Howe's team, who reached the last 16 for only the second time in the club's history.

For three of the four halves of this tie, they also went toe-to-toe with Barca before capitulating.

It may not feel it right now, but they will learn a lot from this chastening experience at the Nou Camp. They certainly have to.

Barcelona welcome Rayo Vallecano to the Nou Camp on Sunday, 22 March (13:00 GMT) before the international break begins.

Newcastle host bitter rivals Sunderland in the Tyne-Wear derby at St James' Park on the same day (12:00).

Watch highlights of every Champions League game from 22:00 on Wednesday on BBC iPlayer and the BBC Sport website and app.

There will also be a Champions League Match of the Day on BBC One on Wednesday, from 22:40 to 00:00.