DML and DMR?

[Syaziq Syazirin]

Hello I'm new at here

Recently i lost 5-0 with very powerful formation in my thought

3N-2(DML, DMR) -2-1-2
And i go to 4-1-2-1-2 nd

The reason i use 4 defenders is because i want to block his dml and dmr if they are moving forward to mr and ml. Am i miscalculated his dml and dmr?

But it was shame and i got second place in champion league.

And the real question is,
What function of his dml and dmr?
I know dr and dl are purposed to block aml and amr but what for dml and dmr?