World Cup champions Argentina came up against Uruguay in a qualifier, losing 2-0.
The game was incident-packed, including a confrontation between Fernandez and summer Blues transfer target Manuel Ugarte.
After the game, Argentine captain Lionel Messi said: “I prefer not to say what I think about some gestures. But these young people have to learn to respect from their elders.
“This game was always intense and hard but always with a lot of respect. They have to learn a little bit."