Arsenal title winner Paul Merson says Chelsea boss Frank Lampard needs to change his system to help Timo Werner end his form slump.
Werner has not scored in his last 12 outings for the Blues and struggled to provide a threat in his favoured central striker role in defeat against Manchester City on Sunday.
"At the moment it does not look like there is a plan, Chelsea look like a group of top players who have been told to just go out and play," Merson told Sky Sports.
"Lampard went with the pace of Timo Werner, Christian Pulisic and Hakim Ziyech against Manchester City but after the game he probably thought he should have gone with Olivier Giroud. That's down to inexperience and learning.
"They need to ditch the 4-3-3, get Kai Havertz behind a front two, get two up front, play that way and cause teams problems, because as it stands things are predictable with Chelsea."
Merson continued: "I don't know where Werner plays.
"I think Chelsea may have signed him to play as a striker, but that is not working, and if his best position is off the left, then Chelsea need a centre forward.
"No disrespect to Olivier Giroud or Tammy Abraham, but you are not going to win the Premier League with those as your front two.
"Giroud and Abraham do great on their day, but they are not going to be in the top six Premier League goalscorers this season, or any season.
"How many teams have won the Premier League without having a player in the top six scorers?"
