Barcelona coach Ronald Koeman was furious that his side missed two penalties in their Copa del Rey victory over Cornella.

The Catalans required extra time to overcome the Segunda B side, with Ousmane Dembele and Martin Braithwaite eventually securing a 2-0 win.

Cornella goalkeeper Ramon Juan had otherwise kept Barca at bay, making seven saves including two from the spot to deny Miralem Pjanic in the first half and Dembele in the second.

Those missed opportunities forced Barca to go to extra time for the third game in a row - after two Supercopa de Espana draws - for the first time in their history.

Barca have now missed five of their past eight penalties in all competitions, including their most recent four in a row, and Koeman slammed their success rate as ill-fitting of a club of their stature.

"The most important thing is always to go through, but we can't be happy because we scored goals," he said.

"We missed two penalties and you have to have more responsibility in these types of games.

"Again, 120 minutes, it's an important topic because we've had three games [like that] and that's on us. We created chances and two penalties... that cannot be.

"I can't complain about the effort but it's not only running, but also creating and being effective. It was really tough today. It cannot be and it can't be accepted.

"You have to win matches earlier. We missed two penalties, we had chances. It cannot be that a team like Barca misses so much.

"I don't understand it, either, because we usually have enough players who can score a penalty. It can be scary. I truly don't know why we've missed so many penalties. You can't miss two penalties as Barcelona players. This isn't serious."

Barca are next in action away to Elche in LaLiga on Sunday.

Ousmane Dembele and Martin Braithwaite scored in extra time to see Barcelona past a resilient Cornella 2-0 in the Copa del Rey on Thursday.

Ronald Koeman's men had two penalties saved in normal time as they failed to break down the Segunda B side who famously knocked out Atletico Madrid in the previous round.

Miralem Pjanic and Dembele each missed from the spot but the latter eventually made the breakthrough with a powerful strike.

The visitors made sure of the win in the very last moment through Braithwaite to ensure there would be no repeat of Wednesday's action, when Real Madrid suffered one of the biggest shocks in the competition's history by losing to Alcoyano.

Barca struggled to turn possession into chances, their first real effort of note coming via a Francisco Trincao volley from Pjanic's corner that was parried by Ramon Juan.

Pjanic had the chance to break the deadlock from the spot after Ronald Araujo took a high foot to the head, but his penalty was expertly saved.

They started the second half with more purpose and should have scored when Martin Braithwaite shot straight at Ramon after Antoine Griezmann diverted the ball into his path.

Griezmann then blasted over the bar with the goal at his mercy after a clever quick free-kick from Pjanic, and Neto had to make a flying save to parry an Agus Medina strike barely a minute later.

Substitute Dembele was given the chance to get the breakthrough 11 minutes from time after another high boot in the box, this time from Pol Moreno on Clement Lenglet, but Ramon held his nerve and blocked the penalty from the middle of his goal.

Braithwaite sliced another clear chance wide of the right-hand post and Ramon came to the rescue again to tip a Pjanic half-volley onto the crossbar and away.

Yet within two minutes of the beginning of extra time, Ramon's resistance was broken, the keeper getting two hands to Dembele's strike from 20 yards out but unable to keep the ball out of the net.

Konrad de la Fuente almost made it 2-0 immediately after coming off the bench, but Ramon threw himself to his left to make another fine stop, before Albert Estelles earned a second booking in the closing moments for a poor challenge on the excellent Araujo.

With the final move of the game, Dembele combined expertly with Pedri, who unselfishly teed up Braithwaite to drill into the unguarded net.

What does it mean? Barca avoid more disappointment – just

This was the first time in their history that Barca had three consecutive games go to extra time, having twice gone the distance in the Supercopa de Espana.

After losing the final to Athletic Bilbao, it was important for Koeman's changed side to respond here and he will be relieved that they eventually found a way through.

With the two Madrid giants already out, the Copa del Rey looks like Barca's safest bet for silverware this season.

Ramon-believable

Ramon made seven excellent saves, including the two penalties, and he will be furious he could only parry Dembele's shot into the top-left corner.

Still, were it not for their keeper, Cornella could well have suffered a straightforward defeat in normal time. 

Puig poor

Riqui Puig has found it difficult to convince Koeman at times and this was not a performance to earn the trust of his coach.

The midfielder, booked for dissent seven minutes in, managed no shots, crosses or key passes and was taken off at half-time.

What's next?

Barca are back in LaLiga action away to Elche on Sunday.

Diego Simeone hinted at the idea he could leave Atletico Madrid at the end of the season after their awful Copa del Rey defeat to third-tier Cornella.

Simeone's LaLiga leaders exited the Copa on Wednesday, losing 1-0 to a goal from former Atletico B defender Adrian Jimenez.

Ricard Sanchez was sent off as Atleti slumped to a shock reverse swiftly described by the Spanish media as a "disaster" among the very worst of Simeone's 502 games in charge of the club.

The long-time coach named a strong side, including record signing Joao Felix, but saw his team remarkably unable to register a single shot on target.

Copa failings are a familiar story by now, though, with the Rojiblancos losing to Cultural Leonesa last season. Meanwhile, they have not beaten a fellow LaLiga outfit in the competition since seeing off Elche in January 2017.

Simeone recognised Atleti are struggling in one-off knockout matches - also losing in last season's Champions League to RB Leipzig - but added the surprising qualifier that it would be an issue to consider only if he was still at the helm next year.

"[Cornella] played better," he said. "In the whole game, what they wanted was always done better than what we wanted.

"They took advantage of the set-piece situations and immediately found the goal.

"The boys tried to compete in the best way. In the first half, we had more chances, and in the second, it was rockier. It got difficult after the red card.

"This competition has not given us satisfaction in recent years but solutions will have to be found if we are here next year."

Saul Niguez, captain on the night, identified the same problem as he added: "We apologise to the fans. We never throw away competitions, but in these single-game editions we are not doing well."

Given Atleti's struggles, the decision to replace Joao Felix with 18-year-old debutant Mario Soriano 15 minutes from time prompted some discussion.

But the Portugal international mustered only one shot, which was blocked, prior to his withdrawal and failed to create a single chance - unlike his replacement.

Joao Felix epitomised the visitors' display as he completed just 13 of his 21 attempted passes and lost possession 13 times, winning none of his three aerial duels.

The change still appeared a big call, yet Simeone explained his star forward was struggling with an ankle injury.

"He was hurt," Simeone said. "We looked for a fresher guy. He had a bruised ankle and we wanted to find a guy in good condition."

Atletico Madrid were the victims of a Copa del Rey giant-killing for a second successive season as Diego Simeone's side went down 1-0 to Cornella.

LaLiga leaders Atleti lost 2-1 to Cultural Leonesa in the round of 32 last season, and slumped out to Segunda B opposition on Wednesday.

The 10-time Copa winners fell behind to Adrian Jimenez's sensational flick seven minutes into the second-round tie in Catalonia.

Saul Niguez hit the woodwork and Lucas Torreira went close with a free-kick, but Ricard Sanchez's second booking compounded Atleti's issues as minnows Cornella claimed a famous triumph.

Sanchez was fortunate not to concede a penalty for handball in the opening minutes, before Jose Gimenez, making his 200th Atleti appearance, scythed down Raul Prieto.

With Gimenez, who was booked for his troubles, off the pitch receiving treatment, Cornella added insult to injury, with Agus Medina's cross flicked home expertly by Jimenez.

Atleti seemed set to restore parity shortly after the 20-minute mark, yet Angel Correa saw two efforts blocked either side of Saul hitting the crossbar.

Though Atleti were seeing over 60 per cent possession, they would have been 2-0 down heading into the break if not for Miguel San Roman's save from Pablo Fernandez.

Vitolo got in behind Cornella's backline early in the second half, only for an errant offside flag to deny him a chance to equalise.

Torreira's curling free-kick was inches away from levelling proceedings, though Atleti were then fortunate that Eloy Gila flicked over from close range at the other end.

Sanchez's frustrating night was made worse when he was deemed to have kicked out at Cornella goalkeeper Ramon Juan – the full-back seeing red just 11 minutes after receiving his first booking as Atleti's comeback efforts proved futile.