By Ewan Murray Arsenal are now four games without victory in the Premier League after only managing a 1-1 draw with Chelsea at Stamford Bridge on Sunday afternoon. There was nothing to separate the London foes during an engaging first half, with neither side able to produce the finishing touch to match the energy and intensity of an end-to-end affair. Gabriel Martinelli had fired Arsenal in front after an hour but Pedro Neto responded with an excellent strike from the edge of the area as the points were shared in west London. How the game unfoldedChelsea were handed an enormous boost before ki…