Argentina switches to 3-man attack against IranArgentina's Lionel Messi laughs during a training session in Vespasiano, near Belo Horizonte, Brazil, Friday, June 20, 2014. Argentina plays in group F of the 2014 soccer World Cup. (AP Photo/Victor R. Caivano)
Coach Alejandro Sabella started with a more defensive lineup with only two strikers in Argentina's 2-1 win over Bosnia-Herzegovina in the Group F opener.
He then changed to a 4-3-3 formation in the second half - a system favored by Messi - and he's continuing with that lineup at the Mineirao Stadium in Belo Horizonte.
Iran coach Carlos Queiroz made one change to the team he fielded in the 0-0 draw against Nigeria, bringing in forward Masoud Shojaei for midfielder Khosro Heydari in what could be a more attacking formation.
Iran: Alireza Haghighi, Jalal Hosseini, Amirhossein Sadeghi, Pejman Montazeri, Ehsan Haji Safi, Javad Nekounam (captain), Andranik Teymourian, Mehrdad Pooladi, Ashkan Dejagah, Masoud Shojaei, Reza Ghoochannejhad.