The London rivals lock horns again on Sunday with the Premier League champions looking to avenge defeats in last season’s FA Cup final and the Community Shield in August.
Arsenal have won three of their last four matches in all competitions against Antonio Conte’s side but are without a win at Stamford Bridge since Robin van Persie’s hat-trick secured a remarkable 5-3 victory almost six years ago.
Chelsea blew Arsenal away 3-1 on their home turf last season and Merson is anticipating an equally one-sided contest if his combined XI, selected in Conte’s preferred 3-4-3 system, is anything to go by.
‘I honesty can’t make a case for anyone other than Alexis Sanchez, the clubs are chalk and cheese and it’s sad,’ said the former Arsenal star.
‘This is Arsenal versus Chelsea and I can only find one Arsenal player. Where has it all gone wrong?
‘Ten years ago I’d be fighting to get a Chelsea player in. I’m not being harsh. People will say I’m taking the mickey but I’d like to sit down with an Arsenal fan and discuss who would really get in.
‘I’m being kind with Sanchez if anything. If you’re a Chelsea fan you’re thinking that’s harsh on Pedro and Willian on current form.’