Reason why people are thinking that Barcelona and Arsenal have chance of winning the europa league it because they have good squad that are very consistent. Arsenal is leading in the EPL and Barcelona is leading in laliga , this makes people believe this two teams have the chance to be at the top of europa.
The real reason that gives Arsenal a big chance to win the Europa League is because they are serious about getting this competition title. look, how Arteta has said on several occasions that he is targeting two titles this season namely, the Premier League and Europa League. for this reason, Arteta has prepared long ago to realize their mission. even though currently the Gunners have a problem with one of their core players who is injured, it does not dampen their mission to continue to target the title of this competition.
On the other hand, after Barcelona slipped in the Champions League. Xavi confirmed during his interview in front of many sports media, that he would make up for his failure in the Champions League by targeting the Europa League and La Liga trophies. However, Barcelona's journey will not be easy. the reason is simple, as we all know. to get into the last 16 of the Europa league, Barcelona must overthrow Manchester United in the playoffs later. So, can Barcelona make it happen. let's wait, until this fight is held.