If in the last two seasons, maybe I would also say that arsenal will beating westham, but for this season, to be honest I'm not sure if arsenal will be able to easily beat westham, this season westham which is handled by moyes has turned into a pretty solid team and very hard to beat, just look at how easily westham beat chelsea and liverpool which is a strong club this season, in my opinion, arsenal will be the next victim of westham.
West Ham is very strong and Arsenal can not underestimate The Hammers. They are making us surprised in this season and their match will be interesting because it can be a broken time for them. When their good streak ends, their bad streak will start. Who will get a start of bad streak?
I hope Arsenal will get one position in top 6 of Premier League and it will help them to enjoy standing on top of table. It can be booster for their next season when they can become stronger and fight for higher targets.
Right now these both London based clubs have good chance for staying in top six because both doing good with have some good challenge from Tottenham and Manchester United even both are unpredictable but still very good and have quality players those can give them very good results.
Today Arsenal need to be in front if they want to win this match for having some good confidence after their captain is out from team just because of disciplinary basis and most chances he will leave club soon with mutual understanding and Arsenal which is already looking for some good players will try to have better replacement.