Arsenal supporters are quite literally in disbelief

As the Arsenal players boarded their plane back to London last week, they'd have felt the job was essentially done.

And after a 3-0 victory away from home in the Europa League, it would have been hard to blame them for feeling that way. The Gunners put one foot in the Round of 16 with their demolition of Ostersund in Sweden last Thursday and gave Arsene Wenger the chance to rest several players ahead of this weekend's Carabao Cup final against Manchester City. https://twitter.com/Arsenal/status/966771778600218625 Ahead of kick-off, supporters vented their frustration over the fact that Wenger hadn't selected an entire second-string side as the likes of Hector Bellerin and Jack Wilshere were selected for the return leg. But, by half-time, we bet most fans were wishing that there was a full strength team on the pitch as the hosts endured a nightmare 45 minutes at the Emirates Stadium. Two goals in as many minutes for the unfancied Ostersund gave Arsenal quite the scare, with it all to play for in the second half. https://twitter.com/btsportfootball/status/966772416671186944 Hosam Aiesh got the first, when he stayed onside and beat David Ospina from close range. An ambitious ball over the top gave Ken Sema quite a lot to do but he made no mistake as he held off Calum Chambers, created a yard of space and walloped the ball into the bottom corner. To say that the atmosphere inside the stadium became tense would be an understatement and, as for those watching from home, the response was not kind. https://twitter.com/iqbal1988/status/966773074564665345 https://twitter.com/akidnamedrager/status/966772984475275264 https://twitter.com/OfficialCaleM/status/966772912635211777 https://twitter.com/OfficialWheelie/status/966772875318394880 https://twitter.com/patthegooner/status/966772868519473153 https://twitter.com/Faiz_ArsenalFC/status/966773986976657408 https://twitter.com/IseunLuese/status/966774231131475968 https://twitter.com/_amuel__/status/966774395778863104 https://twitter.com/JimMacDonaldMMA/status/966774576142307329