I'd say a tie. Hard game to predict.

I don't think Argentina will play 4-2-3-1 though. It makes sense since they need to score. But I think they will play Biglia, Masche, Enzo in the middle with Di Maria Messi and Higuain/Kun Aguero.

Maybe Kun would start since Higuain hasen't had much training yet.

Messi is a genius, I highly doubt he will play in the center as the last games and fall in the trap to be boxed between the 3 holding midfielders Paulinho, Renato Augusto, Fernandinho. especially in a smaller stadium (Belo Horizonate).

He would probably stick to the right wing and exploit Marcelo's back.

The third Argentinian medfielder would be a playmaker, Bigilia in this case to get the ball higher and Messi doesn't have go in the middle to get the ball, thus moving his area of influence in the danger area.

Really tough game to predict, a lot of factors. Tite takes risks trying to neutralize Messi, Willian will be benched and either Coutinho or Neymar will be played out of position, plus leaving a young Gabriel Jesus to play against strong experienced central defenders without anyone stretching the field.

Unnecesary risk if you ask me. I think it will be interesting to see how the game evolves.

Sorry for the long comment. :P