It 's mostly because of the mental part of the game ( lack of focus , discipline , concentration , lack of knowledge ) .
It is a very hard skill to remember to do properly in the game ( just like boxing out is ) .
It 's mostly because of the mental part of the game ( lack of focus , discipline , concentration , lack of knowledge ) , and it is a very hard skill to remember to do properly in the game ( just like boxing out is ) .