The Gunners were slow off the blocks and went behind to a Petr Cech own goal, but eventually recovered as Laurent Koscielny equalized with a wondrous bicycle kick and Santi Cazorla slotted in a last-gasp penalty.
The Round of 16 hasn't been the best for Arsenal players as both Mesut Ozil and Granit Xhaka failed to convert from the spot.
Arsenal have reportedly triggered the release clause of Leicester City striker Jamie Vardy.
Arsenal are set to receive a huge boost ahead of their match against Norwich City as Spanish midfielder Santi Cazorla prepares to return to action at the Emirates.
After suffering a morale shattering 3-2 loss against Manchester United at Old Trafford, the Gunners welcome Swansea City to the Emirates in a crucial mid-week tie. The injury crisis appears to be all but over for Arsene Wenger and he has a strong squad to choose from.
Arsenal FC's title hopes run the risk of being derailed after the London club has been hit by a severe injury crisis, but manager Arsene Wenger insists their injury problem is no different from ones in clubs across Europe.
Arsenal FC missed the opportunity to go top of the Premier League, falling to a 2-1 defeat to Tony Pulis' West Bromwich Albion side at the Hawthorns, with Santi Cazorla missing a great opportunity to salvage a point from the penalty spot
Arsenal went to the Hawthornes as favorites against West Bromwich Albion, but suffered a humbling defeat with Santi Cazorla skying a penalty when the score was 2-1, which went on to be the full time score.
Although he is not being as talked about as some of his other teammates, Nacho Monreal has had a very good season so far at Arsenal FC. However, a couple of years back, he had almost 'missed' his move to the North London club.
Arsenal FC were held by Tottenham Hotspur in the North London derby at the Emirates on Sunday, and an out-of-sorts Santi Cazorla was substituted after a first half that saw Mauricio Pochettino's men dominate proceedings