Strong favourites or tougher task - will Arsenal defend their title?

Arsenal finished seven points ahead of Manchester City to win the Premier League title in May [AFP via Getty Images]Arsenal ended their long wait to win the Premier League again by securing the title last season.It means they begin this campaign as defending champions - something they have not done since the 2004-05 season.The Gunners are favourites to lift the trophy once more - but what does history tell us about how defending champions perform, and just how likely is it that Mikel Arteta's me