It's not a matter of luck because when they strive to be the best then other clubs will definitely not stay silent.
I think Arsenal know what the qualifications are to be in the EPL so they have to try again and again to be able to continue to compete and be in the top competition both in domestic competitions and in the Champions League.
The EPL is one of the most difficult places for the league so when one club cannot adapt and continue to upgrade themselves then the club will be eliminated from the competition.
Right now there is no other way but to keep trying again for Arsenal to achieve a good performance. Last season Arsenal were already on the right track only at the end of the season they failed to continue the positive trend and now the hope is that Arsenal will not make the same mistake with the tight schedule they will face in the new season.
That's right, surely every team won't stand still and surely they will do even better. One proof that they are not silent is when the transfer market comes, their movement in targeting new quality players is proof that they want to be better.
But in this case there is also the truth if you say luck, why? because it is not uncommon for luck to talk about the results of hard work done.
I don't know in this condition I feel that luck doesn't exist in football because if there is a club that can be champions like Arsenal last season and they actually have to be willing to give it up when towards the end of the season it doesn't mean they are unlucky but they are weak in some points that make them have to be willing to lose some matches on the other hand when there is a club that is not a favorite and wins against the favorite club it also doesn't mean they are lucky but they work much harder and their opponents don't really see that because they are sure they can win and it backfires so there is no real luck in football for me.
But back to the context of the Champions League my hope this season is obviously to see the Champions League more than ever with some new faces like Newcastle, Arsenal, Manchester United and even Union being new faces this season.