The perfect solution for beating 4-2-3-1 is playing a formidable 4-1-3w-1-1.imshall explain how this works.
1)u have a DMC to protect the defense as 4-2-3-1 is a very attack minded formation
2)u u will have three central midfielders compared to his 2 central midfielders.hence u can maintain possession
3)u will have a back four to stop his attacking wingers and striker(very important)
4)u will have an AMC who will be unchallenged as opposition does not have DMC

Perfect isn't it.one of the guys who I gave my advice to on another thread won the game easilty by playing this formation