Instead , they predominantly play 4 - 3 - 3 and 4 - 2 - 3 - 1 .
However , Chelsea do n't play a 4 - 4 - 2 formation .
Chelsea predominantly play 4 - 3 - 3 and 4 - 2 - 3 - 1 .
However , Chelsea do n't play a 4 - 4 - 2 formation .