A huge night for Arsenal. They are in the Champions League quarter-finals.

We're back tomorrow for these two matches to find out who will join them:

Atletico Madrid v Inter Milan (agg: 0-1)

Borussia Dortmund v PSV Eindhoven (agg: 1-1)

See you then!

Emma Smith
BBC Sport reporter

Barcelona reached the Champions League quarter-finals for the first time in four years with an entertaining victory over Napoli.

Fermin Lopez and Joao Cancelo put Barcelona on their way at Estadi de Montjuic, but the hosts were made to work hard by the Italian side who pulled one back through Amir Rrahmani.

A back-and-forth encounter was eventually settled by Poland striker Robert Lewandowski's close-range finish with seven minutes of normal time remaining.

Read the full match report here.

Arsenal have progressed to the quarter-finals of the Champions League for the first time since 2009-10, ending a run of seven consecutive last 16 eliminations in the competition.

Leandro Trossard became only the third player to score in each of his first three Champions League home games for Arsenal, after Alexis Sánchez and Bukayo Saka.

Martin Odegaard has seven assists for Arsenal this season in all competitions, with his first in the Champions League tonight.

Porto defender Pepe became the first ever outfield player to appear in a Champions League match at the age of 41 or older.

Phil McNulty
BBC Sport chief football writer

Arsenal reached the Champions League quarter-finals for the first time since 2010 after beating Porto in a penalty shootout following a night of tension at Emirates Stadium.

The Gunners went into this last-16 second leg 1-0 down but drew level when Leandro Trossard put them ahead on the night four minutes before the interval with a smooth finish following brilliant work by captain Martin Odegaard.

A scrappy, fractious encounter failed to yield a winner even after extra time and it was Arsenal who held their nerve to go through to the last eight.

Odegaard, Kai Havertz, Bukayo Saka and Declan Rice were all on target for Arsenal as David Raya saved from Wendell and Galeno to seal victory for Mikel Arteta's side amid scenes of wild celebration.

Read Phil McNulty's full match report.

Image source, Getty Images

David Raya is the first goalkeeper to make at least two saves in a Champions League shootout since Petr Cech (two) for Chelsea against Bayern Munich in the 2012 final.

Martin Keown
Former England defender on TNT Sports

After the game I would always talk about the next one. Arsene Wenger didn't need to go round to players, it was my job to make sure they didnt overcelebrate.

I don't think this Arsenal group will though, they are professional and focussed.

Arsenal

Arsenal manager Mikel Arteta, speaking to TNT Sports: "So happy. It has been 14 years, which is a long time for a club like Arsenal and it shows how difficult it was. We really had to dig in to find the magic moment at the end. We're starting to create an unbelievable energy in the stadium, we were all pushing to get it done and together we have done it.

"You're very nervous [watching a penalty shootout], hoping for the best but you know it's a bit of a lottery. We had prepared the day before so credit to the goalkeeping coaches and everyone that has contributed. It's really difficult to play against Porto, they are really competitive. We didn't get many moments where we could control the game, they're a really good side.

"We scored a goal in a really important moment, we tried to create chances and in the end we managed to do it. There's a lot at stake and every detail is important, you're defending your team on every decision and it's part of the game."

On his message to the Arsenal supporters: "Thank you so much. We absolutely love them, the energy they gave, how positive they were, how they contributed. They made us win, it's as simple as that."

On being in the Champions League quarter-finals and the quality of the line-up: "Unbelievable, that's where we want to be. We've been patient, worked so hard and a lot of people have made good decisions and showed courage in difficult moments and this is where you want to be."

Image source, Getty Images

Porto have been eliminated from each of their last eight major European knockout ties against English opposition.

They last knocked out Manchester United in the 2003-04 Champions League last 16.

Arsenal

Arsenal forward Bukayo Saka speaking to TNT Sports: "I am buzzing. I am so proud of the team, we showed a lot of character.

"I prepare myself and work a lot practising penalties. I was more than ready.

"Right now we are top of the Premier League and into the quarter- finals [of the Champions League].

"That gives us a lot of belief that we can go to the Etihad and get a result. These are the games we play football for.

"Tonight was beautiful. I knew it was going to be a special night. The manager is buzzing, he is so happy for us."

Rio Ferdinand
Former England defender on TNT Sports

This is football at the highest level, the stakes are high and yes the managers will disagree.

Mikel Arteta kept his cool. He didn't engage in the full time incident, knew he had won the game, kept his cool and walked away.

Former Arsenal defender Martin Keown on TNT Sports: "This is what the Emirates was built for. It hasn’t had nights like this before.

"It means momentum. Arsenal can go to Manchester City full of confidence.

"We know it’s the lions den and the ultimate team. It would have been a downer if they lost but this keeps ticking along beautifully.

"A really big night here, they feel like they can be winners. They will feel they can go to the next stage. The fans have got their Arsenal back again."

Theo Walcott
Former Arsenal and Southampton forward on BBC Radio 5 Live

Image source, PA Media

The experience of being in a penalty shootout at this level, and winning it, is something that the players will remember and take a lot from.

They will know what it takes to win these moments now.

They were frustrated at times by Porto, but they dealt with it, will understand it and know how not to react to it going forwards.

"They made us win, as simple as that," Mikel Arteta says about the Arsenal fans at the Emirates.

"It's been 14 years, too long for Arsenal," Mikel Arteta starts in his post-match interview with TNT Sports.

More to follow.

Former Man Utd defender Rio Ferdinand on TNT Sports: "A huge moment for Arsenal, and a huge moment for their season.

"Momentum is everything."

Matthew Upson
Former England defender on BBC Radio 5 Live

Yes this result itself is massive, but the fallout overall is even bigger.

In the Premier League and in the rest of this competition, there are a lot of positives for Arsenal to take.

This experience, winning a penalty shootout against tough, wiley opponents like Porto and coming through it... They will have gained so much from this match.

Arsenal

Arsenal goalkeeper David Raya, speaking to TNT Sports, says: "Obviously it's a great feeling for me personally, first time in the Champions League and for the club to get into the quarter-finals for the first time in so many years.

"We played a really good game from the start. We dominated, created chances and it went down to penalties. We've worked a lot on penalties this year and all the hard work with the goalie coach and the team has paid off.

"A great moment personally and collectively. I'm over the moon to save two penalties in the Champions League to get through to the quarter-finals. They [Porto] made it so difficult over there, they played their game, but we scored the goal we needed and it went down to penalties and it was a crazy moment.

"Apart from physically from the boys, mentally it's difficult, but especially for me to be focused every second, you can't switch off.

"This means everything. You play football for these kind of things and I'm lucky to be playing for Arsenal, to be in the Champions League and to get through to the quarter-finals. We're just going to enjoy the night."