Former Arsenal midfielder Paul Merson has now shared his prediction for how the Gunners will fare up against West Ham United this afternoon. Arsenal will travel to the London Stadium this afternoon knowing that only a win will do if they are to keep pace with Liverpool and Manchester City in the Premier League title race. Arsenal have been warned that a failure to build positively on their win over the Reds last time out will have dire consequences. However, Mikel Arteta has good reason to be wary of the threat that West Ham pose. Whilst the east London outfit are not coming into this match in…