4) They have that winning feeling now
Winning the FA Cup last season has given Arsenal that winning feeling again. They followed it up with another trip to Wembley in August as they beat Manchester City 3-0 in the Community Shield. As already mentioned, they have also found that little bit more confidence and know-how in some of the big games this season, and they will not want to mess up the chance to lift that trophy again, with it being so clear quite how much of a lift it gave everyone last year. In signing Alexis Sanchez as well, they have a player who has won titles elsewhere and knows what to do in the high-pressure matches such as these.