Whether it's four at the back or three, one thing that hasn't been solved by either of Frank Lampard or Thomas Tuchel is just how to get Chelsea's attack ticking.
The Blues came into the London derby against Crystal Palace on the back of a Club World Cup win but that victory in Abu Dhabi was one of hard work in the defensive and attacking side of the game.
However, Tuchel's side never hit top gear regarding scoring lots of goals in the UAE based tournament but this trend has also tarnished any chances of winning this season's Premier League title, Tuchel said in the build-up to the Crystal Palace match.
