Arsenal must think about how to get a replacement player with the same quality of play. or the coach has to be careful to rotate players otherwise they will get tired and end up very easy to get injured.
Arsenal players at the end of the season actually lost their focus and several suffered injuries although not confirmed to be fatal injuries. but they felt a very big loss because they lost their momentum to get the trophy last season. and now they must prepare not to repeat it.
Arsenal have quality players, but they don't have the mentality to be under pressure from a better team like Manchester City. They didn't lose focus, but I think they just don't have the better mentality to lead the table when the pressure is high.
Arteta must teach how the players can have a good mentality when the pressure increases, they must not be influenced by other teams even if they are on the same path. It was difficult to stop Manchester City at the end of last season, that's because they were really consistent with their form. In the coming season, Arsenal must have a good mentality compared to last season if they want to win the title.