By Jude Summerfield Sunday afternoon brings about a fierce London derby which should captivate audiences in England and around the world when Chelsea entertain Arsenal at Stamford Bridge. Even at this early stage of the season, there’s plenty on the line. The Gunners may unexpectedly have been fancied more than the Blues to mount a Premier League title challenge but both sides are sat on 18 points heading into the meeting, ten behind runaway leaders Liverpool. There have been real question marks over the form of the two teams in recent weeks, but Sunday will present the opportunity to get back…