A lacklustre Arsenal were held to a 1-1 draw by Vitoria in the Europa League on Wednesday after Bruno Duarte scored a 91st-minute equaliser
It was the perfect revenge for Vitoria, , as they claimed a deserved point - their first of the current campaign - when Duarte acrobatically found the net
Arsenal had failed to have an effort on target until the 80th minute when Shkodran Mustafi nodded home from another Nicolas Pepe free-kick to put the visitors ahead, but, until that moment, Unai Emery's side had looked devoid of any attacking intent
Despite a below-par performance in Portugal, Arsenal remain top of Group F on 10 points and can qualify for the last 32 on Thursday if second-placed Eintracht Frankfurt beat third-placed Standard Liege
 Despite the point, Vitoria remain bottom of the group and can no longer qualify for the knockout stages
Vitoria made a strong start at the Estadio D
 Alfonso Henriques
 Inside eight minutes, Pepe produced a thunderous strike from 25 yards which had Emiliano Martinez stretching, but it crashed onto the post before going wide
 The Arsenal goalkeeper then made two wonderful saves, getting a strong hand to Marcus Edwards' effort before pushing away a flicked header from Edmond Tapsoba
Arsenal's only shot of the half came in the 22nd minute
 Bukayo Saka got to the by-line before lifting the ball into the area for a waiting Rob Holding, but he could only direct his effort over the bar
 Not long after, Vitoria went close again, but Davidson just curled a shot from range past the post
After a dismal first half, Arsenal were put under pressure early in the second
 Former Tottenham youth product Edwards - who scored the first goal at the Emirates two weeks ago - breezed past Dani Ceballos down the right before pulling the ball back into the middle of the area
 However, Sokratis was there to make the clearance
Just past the hour mark, the Gunners had another sight of goal
 Nicolas Pepe whipped a corner into the area, with Mustafi meeting it, but his header just flashed over the crossbar as Arsenal's wait for an effort on target continued
The game looked to be meandering towards a dull goalless draw until Mustafi popped up with an unexpected Arsenal goal in the 80th minute
 It was Nicolas Pepe and his free-kicks to the rescue once again as he floated a delivery towards the back post, with the defender running away from his marker before rising high to head home
But Vitoria hit back in the first minute of five added on
 It was another easy run for Edwards down the right, getting past Holding, before standing the ball up at the far post
 Rochinha then headed it back across the area for Duarte, who acrobatically swung the ball goalwards, bouncing it over the head of Mustafi and into the far corner
Vitoria could well have scored the winner too as they continued to pummel the Arsenal box with just minutes to play, but Mustafi managed to see a shot just wide, while Rochinha's powerful hit just missed the target
It was another impressive performance from the former Spurs youth player, this time facing his old north London rivals on his own turf
  with his mazy runs and he caused issues on the right-hand side, especially in the second half
He had a hand in the equaliser too, getting past an admittedly weak Arsenal defence like they were not there before his cross was nodded back down for Duarte's fine finish
 He will have caught a few eyes in Europe over the last two games
Arsenal manager : "I think we worked hard and fought against a team who were very strong defensively, and very organised
 They played against us with 100 per cent motivation and also with their supporters
"Our objective this evening was also to keep a clean sheet because we need to improve defensively and be strong in that moment
 We are using each match to achieve that
 We didn't do that this evening against Vitoria, but we are going to take that challenge against Leicester
"In this competition we are taking good results, scoring a lot of goals and not conceding a lot of goals
 We use each match to improve and achieve points in each competition
"We're a little disappointed for the result, but our objective is to be first in the group and we have 10 points and we are first
 We are going to play the next two matches to make sure of that position, and now we are going to prepare for Leicester on Saturday
"Arsenal will be back in Premier League action when they travel to Leicester on Saturday evening,  (kick-off 5
30pm)
 Their next Europa League outing will be on Thursday November 28 when they host Eintracht Frankfurt
Vitoria will host Braga in the Portuguese Primeira Liga on Sunday before facing Standard Liege at home in their next Europa League game, also on November 28
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