Football is unpredictable its not yet sure for any club to win lose. This stage of the game anything can happen. Will feel team like arsenal can win the trophy, it can be a surprise if the Europa game starts arsenal performance may change. Bad performance can occur to any team at anytime and a team can improve anytime as a surprise to anyone.
In soccer performance and luck both are important for the team because if you have good performance and luck is not with you then still you can lose the match as we have too many matches in recent world cup teams with better performance lost against weaker sides with luck was not favouring them in these matches so here we can expect same thing with if Arsenal fail to win Premier League and Europa Cup then surely this all will be their luck even their performance is still good, and they are doing hard work for having better results in this season specially now with the injury of Gabriel Jesus things are looking hard for them even they have few good replacements but still now they need to do hard work for having better results.