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.
Arsenal can try to win Manchester City after all its a game of soccer but i don't think its going to be an easy one as Manchester City are red hot and will definitely not allow arsenal a win as that game would eventually be the title deciding match but the only hope arsenal has is that let the much competition that Manchester City have to play become a barrier to them because this Manchester City team has so much competition to play as they have the FA cup, the champions league and English premier league to battle for the trophy were as arsenal have the English premier league to play for.