The Gunners flirted with elimination on a nervy night in southern Italy and will now have to face one of Europe's most intimidating clubs in the last 16.
Wednesday's 2-0 defeat at Napoli was not quite the disaster that it could have been. If Jose Callejon had scored the home side's second even two minutes earlier, Arsenal really would have faced a fight for its life, knowing that a defeat by three goals would have eliminated the club.
Instead, the team is left facing up to a second-placed booby prize, courtesy of Borussia Dortmund's late win at Olympique de Marseille. A draw would have secured top spot and a potential last-16 tie against the likes of Olympiakos or Schalke. Instead, the Gunners will face one of Atletico Madrid, Barcelona, Bayern Munich, Paris Saint-Germain or Real Madrid in Monday's draw.
|VIEW FROM THE SAN PAOLO
|By Julian Bennetts
So, Arsene Wenger, is your glass half full or half empty? When the draw was made, second place behind Borussia Dortmund would not have been sneered at but this was a real opportunity missed. Arsenal was in control in Naples but let it slip and paid a heavy price with its potential opponents in the last 16.
The team created few opportunities and was punished when Gonzalo Higuain scored, with Jose Callejon's late, late strike counting for little. Ultimately, though, this was a fantastic Champions League group, the first time that three sides have finished on 12 points. Napoli was unfortunate and Dortmund lucky, while Arsenal probably got what it deserved for slackness on the final day.
The Gunners would be considered clear underdogs against Bayern (to which the club lost at the same stage last year), Barcelona (the team's conqueror in 2009-10 and 2010-11) and Real Madrid.
On paper, Atletico or PSG would would appear the easiest options, but the former has won 13 and drawn one of its 15 league games this season, and five of six in Europe, while Les Parisiens are top of the French league and have a certain Zlatan Ibrahimovic in the lineup.
Yet Arsenal's players said all the right things after the game, insisting that they can still make the most of their own missed opportunities.
"To be the best, you have to beat the best," fullback Carl Jenkinson told Goal. "If we didn't play them in the next round it would have been further into the competition. We would have liked to have topped the group and got an easier draw but that is how it turned out and we have to beat them at some stage. It will be tough but that is what this competition is all about.
"It was difficult against Napoli as we were cautious about not conceding early on. It is a different game [in the last 16]. It will be a clean slate in the last 16 and a game of football where there is nothing to worry about as such and we can go out and play our normal game. So, we aren't too worried. We will be very confident going into it and we will have to continue the run we have been on."
That was a sentiment with which Wojciech Szczesny agreed.
"It will be tough but, at this stage of the competition, the teams are the best in Europe so it doesn't matter who we face," said the Pole, who looked worryingly like his old self in Naples as he kicked a clearance against Gonzalo Higuain and was fortunate to see it roll wide.
"What have we learned from our group? That we are doing alright against the best teams in Europe. We have managed to get a very good win in Dortmund and we had a fantastic home record so we have shown people we want to challenge for the Champions League trophy this year. But let's see who we get in the last 16 and try to go and win it."
Could this be a blessing in disguise for Arsenal? No matter how hard the players try to play it down, they have a genuine chance of winning the Premier League. Games against Manchester City and Chelsea will push them to the limit but an early exit from European competition would allow them to focus on domestic issues come March, April and May.
We must first see how they react to this setback, though. Second place in a devilishly tough group is not to be sneered at but Arsenal missed an opportunity to move seven points clear against Everton on Sunday, and a chance to secure top spot in its Champions League group in the south of Italy.
Fatigue will also be a factor. Of the 23 major games that Arsenal has played this season in the Premier League and Champions League, eight of the side have started 18 or more. Jack Wilshere, Mikel Arteta and Mathieu Flamini are not too far behind and it is no surprise that Aaron Ramsey, for example, looks to have suffered a slight dip after his wondrous early-season form.
Wenger will have to manage his squad to ensure that the club is fresh for whatever challenges its face at home and abroad come the New Year.
They say you have to beat the best to win the Champions League - now Arsenal's players must prove that they can.