I'm also of the opinion that Arsenal will beat West Ham United and therefore reduce the deficit from 8 points to 5 points, I'm really positive about that. I just hope Liverpool doesn't start feeling the pressure because they really need to be composed of they are to win the EPL this season.
A really tough game is all that I can anticipate, I know the gunners are at the position where they appear really tough and strong especially as they are even aiming at the league title too just like almost all other top four team but then westham isn't a team to undermine not for any reason as they have been really of a top for and have a relatively fair average performance that is getting them some very productive results that appears like they are in a very good form and I believe even if they get to loose against Arsenal it will be with a slim margin.
West Ham isn't a team to undermine no doubt but I don't think they've shown enough strength that should make you think they'll be able to get a result against Arsenal at the Emirates stadium. Arsenal manager and players still believes that they stand a very good chance of catching up with Liverpool at the top of the English Premier League table and playing at home against a struggling West Ham side that are currently in the 16th position of the league table, I don't expect Arsenal to drop a single point in that game.
You are absolutely correct, west Ham can be very stubborn at times and especially when they are playing with a bigger team and even though football is unpredictable but I don't see west Ham winning or drawing Arsenal unless Arsenal do not want to take advantage of the chance Liverpool gave them and if I am Arsenal coach or players I will encourage and ginger my team to win the match so that Liverpool points difference or margin reduce and Liverpool has started showing some sign of weakness lately and I don't know what's there problem and it is going to be very bad and unfortunate for them that after all the struggle they didn't win the league.