Chelsea had been held to a goalless draw via Arsenal remaining weekend, shedding issues for the primary time since their opening day defeat to Burnley.
But Merson is assured Chelsea will earn 3 issues once they shuttle to the guess365 Stadium this weekend.
The Sky Sports pundit has been a long way from inspired via Stoke up to now this season, with the Potters taking at the Premier League champions at the again of a 2-Zero Carabao Cup defeat to Championship facet Bristol City.
Merson informed Sky Sports: “Chelsea had been deficient in opposition to Arsenal – bar the Pedro likelihood they did not create a lot – and it simply highlighted how a lot they pass over a fully-fit Eden Hazard.
“This is a fit they have got to win as a result of they can’t give the 2 Manchester groups to any extent further of a head-start.
“If they lose at Stoke and City win, that is a six-point hole in September.
“I’ve been upset in Stoke this season, the Newcastle game used to be a nasty end result. But what in point of fact will get me is that they misplaced 2-Zero to Bristol City within the Carabao Cup. That’s a shaggy dog story.
“Stoke are not going to problem for the league and they don’t seem to be getting relegated.
“It’s every other mid-table season. So why now not pass for it within the cup? It used to be a shocker.”