Winning trophy is a bonus and arsenal must be going to the final first. It's too early in talking about the possibility of arsenal to win the trophy since this one being unfavored to win the trophy this season. City and real madrid are still holding the biggest chances to win the UCL trophy this season.
Arsenal needs to go to the semi final first before we can continue to talk how big arsenal's possibility to win UCL this season. Club needs able to perform even better compared to the last time when arsenal played in UCL. Arsenal was unable going to the current round last time and team is just showing another improvment happened to the club.
It's very good for arteta to put all of his focus into the UCL and EPL. Arsenal is leading the way to get EPL trophy but UCL seems still very far for the club to get it. It sounds too good to be true for arsenal to win UCL this season. Being able to play in the final will be good enough for the club.
Arsenal main focus at the moment is to improve their game, indeed so far Arsenal performance in the league has been very good and managed to score many goals, but for the Champions League it seems that they must be able to improve their mentality and performances to be even better because the competition in the Champions League is tighter, currently the Champions League League leaves a strong and experienced team, So Arteta should have used the experience against Porto as a lesson, I think Porto was a slightly weak team in the last 16 yesterday but Arsenal had to work hard enough to beat him and get here, and now they are awaited by a team that is maybe 3 times stronger than Porto.
At the moment Arsenal should not talk about trophies or even qualify for the final, because indeed their position is a little difficult and better for Arsenal to continue to focus on improving their performance ahead of the quarter-final match later, because surely Arsenal will also not be able to avoid big teams like Manchester City and Madrid in the Champions League draw later.