Arsenal were sent crashing out of the Europa League on away goals after Olympiakos stunned Mikel Arteta's side with a 2-1 victory (2-2 on aggregate) to book their place in the last 16
Leading 1-0 from the first leg, the Gunners, who put in an extremely disjointed display, were pegged back by Pape Abou Cisse's strike (53), which forced the tie to extra-time
Arsenal thought they had snatched victory late in the second half of extra-time through Pierre-Emerick Aubameyang's stunning volley, but Youssef El Arabi popped up in the 119th minute to shock the Emirates and cap a historic night for the Greek side
They now go into the round-of-16 draw, which will take place on Friday, while Arsenal's only remaining hope of Champions League football next season rests on a top-four finish in the Premier League, where they are seven points behind fourth-placed Chelsea with 11 games of the season remaining
Arteta named a strong side, including Aubameyang, Nicolas Pepe, Alexandre Lacazette and Mesut Ozil as Arsenal looked to keep their Europa League challenge on track
Granit Xhaka and Pepe had efforts blocked in quick succession in the early stages, before Pepe was hauled down right on the edge of the penalty area by Ousseynou Ba as he looked to burst through on goal
Ba was cautioned by referee Davide Massa, but Pepe could not take advantage as his free-kick failed to trouble goalkeeper Jose Sa
The Gunners, who needed two crucial interventions from Shkodran Mustafi to thwart Olympiakos, started sluggishly and they struggled to find their fluency as Arteta watched on closely from the sidelines
Arsenal thought they were in front just before half-time as Bukayo Saka crossed for Lacazette to turn home but - unlike the goal from the same combination in Greece a week earlier - this one was correctly ruled out for offside against the full-back
After a first half with hardly any chances, it was Olympiakos who would stun north London as they look the lead
 Mathieu Valbuena put a corner into the middle of the Arsenal box and picked out a completely unmarked Cisse, who guided his header past Bernd Leno
Olympiakos took confidence from taking the lead and it took until the 77th minute for Arsenal to have their first shot on target, Pepe drawing a smart stop out of Sa, with Lacazette heading the rebound wide with the goal at his mercy
With the visitors starting to drop deep, substitute Lucas Torreira was next to force Sa into action with a low effort from the edge of the box before a fine last-ditch Tsimikas challenge stopped Ozil from getting a shot away as the game went into extra-time
Olympiakos substitute Giorgos Masouras clipped the top of Leno's crossbar as the second half of extra-time got under way
Arsenal were still struggling for rhythm but it would be their main man, Aubameyang, who looked to have rescued their European hopes
 Ozil crossed into the middle where Gabriel Martinelli contested a header and the loose ball dropped to Aubameyang to finish with an acrobatic bicycle kick
However, despite just six minutes remaining, it would not be the end of the drama as El Arabi swept home in the final moments to send the away fans into rapturesThere was still time for one more chance and it fell to Aubameyang, but this time the Gunners skipper, who had just the goalkeeper to beat, could only fire wide from six yards out as a chance of silverware and a path to the Champions League disappeared for Arteta and Arsenal
Arsenal head coach : "It hurts big time
 We had a lot of hope in this competition
 It was a great way for us to be able to go to Europe and as well, it's a very beautiful competition to try to win
 I think we did a lot of positive things in the game, I think we created a lot of positive chances to win the game but if you concede two set pieces in a tie like this you put yourself in big trouble
"I just want to concentrate now on lifting those players and getting back the belief, and convince them that there is still a lot to play for, and move on
 It's part of this sport that a big disappointment can happen and it happened tonight
 We have to learn and react as a team and as a club
"I'm the first one, I have to lift them, it's my job
 That's the first thing I have to do
 First of all we have to digest it because it's very, very painful tonight
""It hurts big time," Mikel Arteta said in his post-match press conference
 "We had a lot of hope in this competition
 It was a great way for us to be able to go to Europe and as well, it's a very beautiful competition to try to win
"The pain of this Europa League exit will take a lot of getting over for Arsenal and Arteta
 This competition was a big chance of silverware and a route into the Champions League, but that all disappeared in dramatic circumstances as Olympiakos snatched a place in the last 16 at the expense of the Gunners
There was a positive atmosphere starting to build around the Emirates Stadium as Arteta led his side to unbeaten start to 2020
 They had just had three wins in a week and everything was starting to look better, but now, the Spaniard faces the biggest challenge of his short managerial career as he attempts to lift his players after that heart-breaking exit
There is still the FA Cup to play for and although it's an outside chance, they can still finish in the top four of the Premier League to qualify for the Champions League
 Arteta must now find a way to brighten the mood in the Arsenal camp, and quickly, because if he does not, all his good early work at the Emirates Stadium will be undone
It's a big test for Arteta and his coaching staff, and he knows it
 "I'm the first one, I have to lift them, it's my job," he said
 "That's the first thing I have to do
 First of all we have to digest it because it's very, very painful tonight
"It's a challenge they must overcome though, starting against Portsmouth in the FA Cup on Monday, otherwise their season will be over very quickly
Olympiakos' attentions now turn to t, with proceedings set to start at 12pm, UK time
 You can follow it on  and with our live blog on the website and app
The first legs for the round of 16 are scheduled for Thursday, March 12, with the second legs to be held a week later on March 19
Up next for Arsenal is a trip to Portsmouth in the FA Cup fifth round on Monday, March 2; kick-off 7
45pm
 The Gunners are back in Premier League action on Saturday, March 7 against West Ham at the Emirates Stadium; kick-off 3pm
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