I had so much confidence in Arsenal going into the game and I really think this game would have had a different story if Arteta took advantage by playing his first eleven team in the first leg meeting, Arsenal would have won by a margin and had better advantage over Sporting going into the second leg but they failed to win and Sporting got motivated by the result and returned fully confident in the second leg.
Arsenal performance was impressive in all season in both competitions but sadly in second leg match they lost on penalties which is game of luck with their performance in this match was also not as expectations because Sporting give them good competition and not allow playing as they were doing in all season against all other teams with this advantage they have good end or regular time which was ended with 1 - 1 and this was won for them from here and things turn into their favor after penalties shot out because here we can say anyone game because just one wrong kick can give you kicked out of the competition so same happen to them and Brazilian star Martinelli fail to convert his penalty no 4 which eliminate them from the competition and now their dream of having double in this season is also ended.
Sometimes I dont understand the reason behind certain things Arteta does. He said the same thing last season and they ended up not making top four. The ideology of not playing your best players in a knockout stage could leave the club trophyless for a longer period. I will still say it again, EPL is not guaranteed but they move on from here. They need to win as much trophies as possible, winning that match inorder to advance in the competition would have been good moral Booster.