With the type of players Argentina has on defence viz Zanetti and Heinze, specifically the former who tends to push forward whenever he feels like and on attack with roman, aimar and messi inthe mix, for an inferior team ,Masche would undoubtedly suffice. However against quality teams it's going to be overwhelming for solitary Masche. He would definitely need a helping hand from the likes of Gago/Cambiasso, if required are capable of switching to decent attack mode although much known for their defensive duties in the midfield, because Roman, aimar and messi are definitely not going to supplement Masche with his holding responsibilities. So, I still am adamant that Argentina needs two holding players however as earlier stated i am willing to relax the idea if they are facing an inferior team.