Arsenal's main hope is to win all of their matches until the end of the season; otherwise, they will lose the title to Manchester City.
Can Arsenal win Manchester City? I do not think so. Arsenal's best hope is that Manchester City loose a game, which is not something to expect even if Manchester City rest key players. Manchester United did well today, still managing to win very well with their many injury problems even with the latest Sabitzer. Manchester United is safe in the premier league somehow, but for the other competitions that they are in and will like to win, their chances have been greatly reduced.
I know its hard for arsenal to beat man city but they don't need to even a draw will be a good result for them and it will keep the point that seperate them considering man city win their missing game, there are still a lot of games to be played and both teams can lose points so i think arsenal chances are still good.