Meulensteen thinks United can pose serious problems for Liverpool if Martial gets them on the counter.
"Jose [Mourinho] will have seen the condition of his internationals after they've returned and he won't have had too much time to work with them," Meulensteen told ESPN.
“He won't like that because he likes every detail sorted.
“I suspect he'll have a pragmatic approach, with enough numbers behind the ball.
“He knows that Liverpool will fly out of the blocks.
“It's a tight pitch, but if Jose plays with [Romelu] Lukaku, [Marcus] Rashford and [Anthony] Martial then you can counter them.
“You can hit Liverpool instantly and be dangerous on the counter every time."