Contact the agent. Lol
Can't guess how Arsenal will play later --- whether to play defense or more to attack like in the first leg, but if Arsenal's game is suppressed then the possibility of Arteta's strategy could be defensive all the time, because Real Madrid's way to win will be very wild to continue to attack Arsenal's defense.
I think 70% of Arsenal is very safe because they are 3 goals ahead in the first leg so in the second leg Arteta only needs to arrange a more ideal formation to defend against the host's attacks. Automatically Real Madrid will not play casually, they will definitely attack from the first minute so Arsenal's defense wall must be really strong to be able to stop the attacks carried out by Real Madrid.
If Arsenal manages to eliminate Real Madrid, all fans will be quite happy because beating Real Madrid in the Champions League is so difficult. For that, in the second leg Arsenal must play more carefully because they have a better chance in the Champions League compared to their hopes in the Premier League.
Playing more defensively and strengthening the defense line as well as building and gathering players in the defense area is a must for Arsenal, because their opponent is Real Madrid who is known to be able to make a comeback even though they are in a disadvantageous position in the first leg because they suffered a big defeat and that always happens and this is what Mikel Arteta must think about and plan very carefully.
However, I am sure Mikel Arteta already knows and plans everything and will also motivate the players to play very carefully and also focus on paying attention to Real Madrid's attackers to continue to put pressure because pressure is something that can make it difficult for attackers to penetrate the defense to be able to score goals. And if you look at their current performance, I am optimistic that Arsenal can maintain their advantage even though Real Madrid won this match but the aggregate victory remains on Arsenal's side, because 3 goals without reply in the first leg is a very good provision.