I hav posted this earlier.we hv had enuf discussions.. "For all those who say luiz could be a good DM.... I think his forward runs have made people think that he'd make a great midfielder by default, but I disagree after seeing Phil jones performance against scousersbecause in my opinion, the thing that allows him to make those runs out of defence is that as soon as he steps out of defence, he gives us a man advantage in the opposition half. That's because the striker isn't going to track back and follow him all the way back. That means that he is given a free run in the opposition half as confusion arises among the defending team and nobody knows who's supposed to pick him up and track the run. When he plays in midfield he's going to be up against an opposing midfielder who will mark and track him, and therefore his surging runs will be much tougher to pull off when he plays in midfield and has a man on him all the time."