Don't worry, I'm sure Arsenal will win. They've suffered lose streaks, so all the players must be motivated to win especially Crystal Palace is just a mediocre club. Crystal Palace just lost against Everton yesterday, so they should be lack of stamina.
Even though Arsenal's performance is declining, but Crystal Palace is worse than Arsenal. Unfortunately the match is not worth to bet, the odds is too low and it's full of uncertainty.
Arsenal's performance is indeed declining, so in matches such as against West Ham, Arsenal lost with a score of 0-2, in the match against Fulham, Arsenal also lost with a score of 2-1 and in the FA Cup, Arsenal also lost with by Liverpool a score of 0-2, but in the next match If the in English league loses to Crystal Palace, I think it will be difficult for Arsenal to become champions this season because of course it will be difficult to catch Aston Villa, but I am sure that Mikel Arteta will make Arsenal win against Crystal Palace because of course if they lose, Arsenal will definitely be embarrassed because of Crystal Palace. The ranking is far from Arsenal and Everton today just beat Crystal Palace with a score of 1-0. In my opinion, Crystal Palace still has time to recover its stamina to fight Arsenal, so of course Arsenal has to be alert because Crystal Palace will definitely also appear confident against Arsenal. Roy Hodgson will definitely create good techniques and formations to play against Arsenal and will definitely have researched Arsenal's past matches.
Yes, Crystal Palace compared to Arsenal, of course Arsenal is stronger, that's why Arsenal is now ranked 4th in the English league. It is very difficult to predict who will win this match, but I personally want to bet on Arsenal winning.