“Chelsea will beat them this weekend,” continued Merson.
“Away from home they can beat almost anybody. The problem is at home where they are very predictable.
“You’ve just outfoxed Jose Mourinho and won at Tottenham. Now you have to be flexible. But you’re still playing three at the back at home to Southampton and you lose 2-0.
“That was a big mistake and it came back to bite them. Frank Lampard is probably glad this game is not at Stamford Bridge because it actually suits them.”
As for Arteta’s transfer window plans, midfielder Granit Xhaka could be on his way out of the north London club in January.