Argentina looking up at towering foe Iceland

In theory, two-time World Cup winner Argentina really shouldn't be fearful of facing tournament rookies Iceland. But there is a bit of worry in the Argentina camp: the height effect.

Icelandic footballers are the tallest at the World Cup in Russia with an average height of 1.85 meters (just over 6 feet). That makes them especially strong in aerial duels. It's a weapon that Iceland will try to use to counter the individual brilliance of Lionel Messi and other players when the two teams face each other Saturday in Group D.

Argentina is among the shortest teams at the tournament at 1.79 meters (just over 5-feet-10 inches). So coach Jorge Sampaoli has put special emphasis on height during tactical work that continued Wednesday at the team's training center in the Moscow suburb of Bronnitsy.