For much of the beginning of the season, Frank Lampard struggled to find the right balance to his Chelsea side.
The Blues boss would go for the 4-2-3-1 formation, trying to get the best out of his new forwards and looking for them to gel.
However, what it also did leave the defence exposed, with the Blues midfield of two being separated too far apart from each other.
For the past few games, Lampard has changed direction with his set-up and gone back to the 4-3-3 formation.
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It has been a success as well, with the Blues looking balanced in attack and defence, with one key reason being the answer.
Having N’Golo Kante in the more defensive position allows him to protect the back four, while Lampard is also able to play two, more attacking, number eights.
The key for the Blues boss was having the right players next to Kante, and he seems to have found the perfect partners in Mason Mount and Kai Havertz.
The duo have the creative ability to really add to the attacking threat of those ahead, while they have the work rate to balance the team out.
After the win over Burnley, Lampard said: “It is very normal when you miss pre-season and you are looking for those tweaks in formation at the start of the season.
“Now, we are playing in a slightly different way and there have been a number of positives. That doesn’t mean that we can’t change back. It is great to see what it did for Kai and Mason today is to bring those attributes in what we regard as really offensive players but when they have the energy and desire to cover ground to help the team.
“Then pick the ball up and be dangerous when they arrive high, they are both things that Kai and Mason have.
“Again, it is through the balance of the team and working on that…