Argentina has changed its formation from 4-3-3 to 5-3-2 for its opening World Cup match against Bosnia.
"It has to do more with [many] things, but I can’t say what publicly," said Alejandro Sabella.
Gonzalo Higuaín is battling injury and his fitness is a possible cause, though some have speculated that Lionel Messi has demanded to play as a striker.