Well, it has been a miserable couple of days for Premier League sides in the Champions League.

Are Chelsea the only domestic hope of success in Europe's premier club competition? Or have we got a surprise or two in store when the second leg fixtures come round?

Those get under way on the 17 and 18 March so until then, goodbye.

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Amy Lawrence, football reporter for The Guardian: "Now the Wenger Dilemma becomes the story again. It ebbs and flows over the course of the season, and it's a vulnerable situation for the club. Now everyone is asking everyone whether you are for Wenger or against Wenger. And that's a destabilising situation."

Justin in London: Absolutely embarrassed to be an Arsenal fan tonight. Shocking heartless display from the players.

Harvey from Hull: Wenger needs to leave at the end of the season for his own good, or after all these poor performances people will start to forget all the good he did for the club.

Adeel in Leamington Spa: All the boo-boys can do one. We will still get through.

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Former Arsenal and England centre-back Martin Keown
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"Arsene is like family. I worked with him. I believe in Arsene Wenger, and he needs to be given the time. He's got two years and he knows the rules - if he's losing the reflexes then you have to walk out the door. Let's not look at the next man, but look at what Wenger brings. And we're all willing him to turn this around.

"The weekend will tell us a lot about the players, the fans, but in particular the manager. Sunday couldn't come quick enough for Arsenal for them to try and get this back on the road."

Image source, Uefa.com

Prince Albert of Monaco was at the game and joined in the celebrations.

"I never thought I would see this scoreline here. But it's deserved," he told Uefa.com., external "A draw would have been great for us. Before the game I met Arsene and asked him to be kind to us. I'm sort of sad for him, for us to have stolen the show."

Arsenal manager Arsene Wenger has been speaking to Sky Sports and, when asked where things when wrong tonight, he simply responds "a little bit everywhere".

"A horrible night but congratulations to Monaco they defended very well and caught us on the break," he says.

"We controlled the game quite well, with their first shot on goal they scored. Everything went for them tonight but you see why they did well in the group stage. They didn't weaken throughout but we did.

"The task is massive now. The third goal makes it even more difficult. We will have a go of course.

"It's very, very disappointing but Champions League is down to performance on the day and when you don't perform at the level requested for 90 minutes you are punished. We knew they absorb you and get you on the break, what happened is exactly that."

Former Arsenal and England centre-back Martin Keown
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"Wenger is on it. He is in touch 100% with his team and how they emotionally collapsed in the game. They were unprofessional in their youthful exuberance, and they lost it.

"It's one thing to identify the problems but it's another thing to make the necessary changes. Big decisions have got to be made, but he loves every player and treats every player like hi son. But he's got to be ruthless for the benefit of the team. Arsenal were so intent on winning it that they ended up losing it."

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Image source, Getty Images

Arsenal boss Arsene Wenger: "The third goal makes our task extremely difficult in the second leg. It looks like we lost our nerve and our rationality on the pitch. The heart took over the head and that doesn't work. Mentally we were not sharp enough to get into the game, and we paid for it.

"In the first 20 minutes we could have won the game, but Monaco are strong physically. We missed our chances - look at the number we missed tonight. At that level we cannot afford to do that.

"I hope my players were not complacent, but it looks when you are lacking sharpness that anything is possible. Football is not on paper, it's down to your performance. On the night Monaco produced a performance and we didn't.

"Giroud had an off night tonight and he missed easy chances. It looked like it was not one of his best days."

Image source, Getty Images

Read chief football writer Phil McNulty's full report on Arsenal's defeat to Monaco.

Can Arsenal turn things around in the second leg? It would be some achievement if they do. No team has lost a European Cup/Champions League first-leg knockout tie at home by two goals and progressed to the next round since Ajax in 1969. Ouch.

Michael Wechie: Arsene Wenger got it wrong right from the line-up, even before the match begun.

Kavit Gada: Sack Wenger now! There's still time to save our season and turn this horrendous result around.

Seany Ekon: Gutted for Wenger. Embarrassing for him to lose a French team.

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Image source, Getty Images

Harry Hopwood: Not sure if this has been mentioned already, but how tall was the ref!?!

Deniz Aytekin of Germany. 6'5". Only 36 years old. Just an inch shorter than Per Mertesacker.

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Amy Lawrence, football reporter for The Guardian: "Arsene Wenger knows Monaco very well because he follows French football intimately and knows Monaco very well. He wanted a cautious start. In recent years, Arsenal have conceded early at home in the Champions League and it undoes them. And here we are again. Wenger is desperate to break the curse, the pattern, but it was a catastrophe tonight."

Monaco midfielder Geoffrey Kondogbia, speaking on Uefa.com: "We're not surprised. We know our capacities. We knew that we had to be at 200% to have a chance. We prepared for this game well. We knew we could do it if we had few chances.

"It's true we didn't expect to win with a two-goal gap. My goal, I knew before receiving the ball from Joao that I would try my luck."

Former Arsenal and England centre-back Martin Keown
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"The team is not professional enough. They get too caught up in the moment, and they cannot afford to react to games like that. They need to be professional and to step away from the emotion of it all.

"This game won't be addressed inside the camp until tomorrow. There is nothing to be gained by Wenger letting off steam in the dressing room tonight. He has a great deal of self-control and I have never seen him lose the plot. I saw him kick something once and then walk off. He will rebalance and come back, though he might not sleep well tonight."

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Julien Laurens, French football reporter: "Everbody in France will be surprised right now. Monaco's work ethic was wonderful and tactically they were spot-on. They are so strong defensively. I just cannot believe Arsenal did not test the two young fullbacks and did not put more pressure on the whole defence.

"There is a second leg and all this could be different, but this is one of the biggest results for a French team in the history of the Champions League. This is as good a performance from Monaco as it was a bad one from Arsenal."

Former Arsenal and England centre-back Martin Keown
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Image source, Reuters

"Arsene Wenger will reflect on this result and he will not be giving up on this tie. He will probably be feeling embarrassed because he's a proud Frenchman. This will hurt to the core tonight, but he will come back fighting. So don't discount Arsenal.

"But this might help Wenger find a better balance with his team, because his balance tonight was not right. Wenger will be given time, be given two more years to make this work, and I can tell you he will not be giving up."

"It's OK to go out to a Bayern or an AC Milan, but to a Monaco? There are different sorts of questions Arsene Wenger will have to answer."

It might have been a little bit different if Olivier Giroud had popped his shooting boots on.

The striker had six shots tonight, the most he has ever recorded in a Champions League game. That's good. All six, though, were off target. That's not so good.