The Line-up
The team will most likely line-up in a 4-3-3/4-4-2 hybrid formation with Di Maria covering the left flank along with Tagliafico and Lo Celso operating in a winger-midfielder hybrid role (like Bernardo Silva at Manchester City), with Paredes and Guido Rodriguez forming a double pivot with Rodriguez being the deepest of the two.
Talking about Messi, he would be given the tactical freedom to roam freely around the pitch and keeping him close to a technically gifted player like Lo Celso would help Argentina during the build up phase
Out of the two full-backs, Renzo Saravia would be the more reserved one. He would attack the forward space pretty less compared to Tagliafico.
The Bottom Line
After a disastrous World Cup campaign, Argentina would still be considered amongst the favourites, only because of a certain Messi in their team. It is fair enough to say that La Albiceleste hopes hang heavily on Messi's form this summer, and Scaloni should try his best to create a team around him, but not heavily dependant on him at the same time.